title: I have a problem with decimals adding weirdly
body: <p>My code is working well until I get to the program with my output now falling in acceptable perimeters.</p>
  <p>I am adding like this:</p>
  <pre><code>using System;
  
  namespace ITSS131
  {
      public class Program
      {
          public static void Main(string[] args)
          {
              Console.WriteLine(&quot;hello what is your car loan amount.&quot;);
              decimal loan = decimal.Parse(Console.ReadLine());
  
              Console.WriteLine(&quot;What is your APR&quot;);
              decimal APR = decimal.Parse(Console.ReadLine());    
  
              Console.WriteLine(&quot;What is the monthly payment&quot;);
              int monthlypayment = int.Parse(Console.ReadLine());                       
  
              int currentmonth = 0;
  
              int u = 0;
  
              int c = 1; 
              while (loan &gt;= 0.00m)
              {
                  decimal.Round(APR);
                  decimal TAX = APR / 12.00m / 100.00m;
                  decimal.Round(TAX);
                  decimal TAX2 = TAX * loan;                
                  decimal Tax3 = monthlypayment - TAX2;
  
                  decimal.Round(loan = loan + TAX2 - monthlypayment);
                  currentmonth++;
  
                  Console.WriteLine($&quot;Month - Interst - Principle -   Balance&quot;);
                  Console.WriteLine($&quot;{currentmonth} {TAX2.ToString(&quot;C&quot;)} {Tax3.ToString(&quot;C&quot;)} {loan.ToString(&quot;C&quot;)}&quot;);
               }
          }
      }
  }
  </code></pre>
  <p>The output is suppose to be</p>
  <pre><code>    1     $78.75     $271.25   $20,728.75
      2     $77.73     $272.27   $20,456.48
      3     $76.71     $273.29   $20,183.19
      4     $75.69     $274.31   $19,908.88
      5     $74.66     $275.34   $19,633.54
      6     $73.63     $276.37   $19,357.17
      7     $72.59     $277.41   $19,079.76
      8     $71.55     $278.45   $18,801.31
      9     $70.50     $279.50   $18,521.81
     10     $69.46     $280.54   $18,241.27
     11     $68.40     $281.60   $17,959.67
     12     $67.35     $282.65   $17,677.02
     13     $66.29     $283.71   $17,393.31
     14     $65.22     $284.78   $17,108.53
     15     $64.16     $285.84   $16,822.69
     16     $63.09     $286.91   $16,535.78
     17     $62.01     $287.99   $16,247.79
     18     $60.93     $289.07   $15,958.72
     19     $59.85     $290.15   $15,668.57
     20     $58.76     $291.24   $15,377.33
     21     $57.66     $292.34   $15,084.99
     22     $56.57     $293.43   $14,791.56
     23     $55.47     $294.53   $14,497.03
     24     $54.36     $295.64   $14,201.39
     25     $53.26     $296.74   $13,904.65
     26     $52.14     $297.86   $13,606.79
     27     $51.03     $298.97   $13,307.82
     28     $49.90     $300.10   $13,007.72
     29     $48.78     $301.22   $12,706.50
     30     $47.65     $302.35   $12,404.15
     31     $46.52     $303.48   $12,100.67
     32     $45.38     $304.62   $11,796.05
     33     $44.24     $305.76   $11,490.29
     34     $43.09     $306.91   $11,183.38
     35     $41.94     $308.06   $10,875.32
     36     $40.78     $309.22   $10,566.10
     37     $39.62     $310.38   $10,255.72
     38     $38.46     $311.54    $9,944.18
     39     $37.29     $312.71    $9,631.47
     40     $36.12     $313.88    $9,317.59
     41     $34.94     $315.06    $9,002.53
     42     $33.76     $316.24    $8,686.29
     43     $32.57     $317.43    $8,368.86
     44     $31.38     $318.62    $8,050.24
     45     $30.19     $319.81    $7,730.43
     46     $28.99     $321.01    $7,409.42
     47     $27.79     $322.21    $7,087.21
     48     $26.58     $323.42    $6,763.79
     49     $25.36     $324.64    $6,439.15
     50     $24.15     $325.85    $6,113.30
     51     $22.92     $327.08    $5,786.22
     52     $21.70     $328.30    $5,457.92
     53     $20.47     $329.53    $5,128.39
     54     $19.23     $330.77    $4,797.62
     55     $17.99     $332.01    $4,465.61
     56     $16.75     $333.25    $4,132.36
     57     $15.50     $334.50    $3,797.86
     58     $14.24     $335.76    $3,462.10
     59     $12.98     $337.02    $3,125.08
     60     $11.72     $338.28    $2,786.80
     61     $10.45     $339.55    $2,447.25
     62      $9.18     $340.82    $2,106.43
     63      $7.90     $342.10    $1,764.33
     64      $6.62     $343.38    $1,420.95
     65      $5.33     $344.67    $1,076.28
     66      $4.04     $345.96      $730.32
     67      $2.74     $347.26      $383.06
     68      $1.44     $348.56       $34.50
     68      $0.13      $34.50        $0.00
  </code></pre>
  <p>but instead i get</p>
  <pre><code>Month - Interst - Principle -   Balance
  1      $78.75      $271.25     $20,728.75
  Month - Interst - Principle -   Balance
  2      $77.73      $272.27     $20,456.48
  Month - Interst - Principle -   Balance
  3      $76.71      $273.29     $20,183.19
  Month - Interst - Principle -   Balance
  4      $75.69      $274.31     $19,908.88
  Month - Interst - Principle -   Balance
  5      $74.66      $275.34     $19,633.54
  Month - Interst - Principle -   Balance
  6      $73.63      $276.37     $19,357.17
  Month - Interst - Principle -   Balance
  7      $72.59      $277.41     $19,079.76
  Month - Interst - Principle -   Balance
  8      $71.55      $278.45     $18,801.30
  Month - Interst - Principle -   Balance
  9      $70.50      $279.50     $18,521.81
  Month - Interst - Principle -   Balance
  10      $69.46      $280.54     $18,241.27
  Month - Interst - Principle -   Balance
  11      $68.40      $281.60     $17,959.67
  Month - Interst - Principle -   Balance
  12      $67.35      $282.65     $17,677.02
  Month - Interst - Principle -   Balance
  13      $66.29      $283.71     $17,393.31
  Month - Interst - Principle -   Balance
  14      $65.22      $284.78     $17,108.53
  Month - Interst - Principle -   Balance
  15      $64.16      $285.84     $16,822.69
  Month - Interst - Principle -   Balance
  16      $63.09      $286.91     $16,535.78
  Month - Interst - Principle -   Balance
  17      $62.01      $287.99     $16,247.78
  Month - Interst - Principle -   Balance
  18      $60.93      $289.07     $15,958.71
  Month - Interst - Principle -   Balance
  19      $59.85      $290.15     $15,668.56
  Month - Interst - Principle -   Balance
  20      $58.76      $291.24     $15,377.32
  Month - Interst - Principle -   Balance
  21      $57.66      $292.34     $15,084.98
  Month - Interst - Principle -   Balance
  22      $56.57      $293.43     $14,791.55
  Month - Interst - Principle -   Balance
  23      $55.47      $294.53     $14,497.02
  Month - Interst - Principle -   Balance
  24      $54.36      $295.64     $14,201.38
  Month - Interst - Principle -   Balance
  25      $53.26      $296.74     $13,904.64
  Month - Interst - Principle -   Balance
  26      $52.14      $297.86     $13,606.78
  Month - Interst - Principle -   Balance
  27      $51.03      $298.97     $13,307.80
  Month - Interst - Principle -   Balance
  28      $49.90      $300.10     $13,007.71
  Month - Interst - Principle -   Balance
  29      $48.78      $301.22     $12,706.49
  Month - Interst - Principle -   Balance
  30      $47.65      $302.35     $12,404.14
  Month - Interst - Principle -   Balance
  31      $46.52      $303.48     $12,100.65
  Month - Interst - Principle -   Balance
  32      $45.38      $304.62     $11,796.03
  Month - Interst - Principle -   Balance
  33      $44.24      $305.76     $11,490.27
  Month - Interst - Principle -   Balance
  34      $43.09      $306.91     $11,183.35
  Month - Interst - Principle -   Balance
  35      $41.94      $308.06     $10,875.29
  Month - Interst - Principle -   Balance
  36      $40.78      $309.22     $10,566.07
  Month - Interst - Principle -   Balance
  37      $39.62      $310.38     $10,255.70
  Month - Interst - Principle -   Balance
  38      $38.46      $311.54     $9,944.16
  Month - Interst - Principle -   Balance
  39      $37.29      $312.71     $9,631.45
  Month - Interst - Principle -   Balance
  40      $36.12      $313.88     $9,317.56
  Month - Interst - Principle -   Balance
  41      $34.94      $315.06     $9,002.50
  Month - Interst - Principle -   Balance
  42      $33.76      $316.24     $8,686.26
  Month - Interst - Principle -   Balance
  43      $32.57      $317.43     $8,368.84
  Month - Interst - Principle -   Balance
  44      $31.38      $318.62     $8,050.22
  Month - Interst - Principle -   Balance
  45      $30.19      $319.81     $7,730.41
  Month - Interst - Principle -   Balance
  46      $28.99      $321.01     $7,409.40
  Month - Interst - Principle -   Balance
  47      $27.79      $322.21     $7,087.18
  Month - Interst - Principle -   Balance
  48      $26.58      $323.42     $6,763.76
  Month - Interst - Principle -   Balance
  49      $25.36      $324.64     $6,439.12
  Month - Interst - Principle -   Balance
  50      $24.15      $325.85     $6,113.27
  Month - Interst - Principle -   Balance
  51      $22.92      $327.08     $5,786.20
  Month - Interst - Principle -   Balance
  52      $21.70      $328.30     $5,457.89
  Month - Interst - Principle -   Balance
  53      $20.47      $329.53     $5,128.36
  Month - Interst - Principle -   Balance
  54      $19.23      $330.77     $4,797.59
  Month - Interst - Principle -   Balance
  55      $17.99      $332.01     $4,465.58
  Month - Interst - Principle -   Balance
  56      $16.75      $333.25     $4,132.33
  Month - Interst - Principle -   Balance
  57      $15.50      $334.50     $3,797.83
  Month - Interst - Principle -   Balance
  58      $14.24      $335.76     $3,462.07
  Month - Interst - Principle -   Balance
  59      $12.98      $337.02     $3,125.05
  Month - Interst - Principle -   Balance
  60      $11.72      $338.28     $2,786.77
  Month - Interst - Principle -   Balance
  61      $10.45      $339.55     $2,447.22
  Month - Interst - Principle -   Balance
  62      $9.18      $340.82     $2,106.40
  Month - Interst - Principle -   Balance
  63      $7.90      $342.10     $1,764.30
  Month - Interst - Principle -   Balance
  64      $6.62      $343.38     $1,420.91
  Month - Interst - Principle -   Balance
  65      $5.33      $344.67     $1,076.24
  Month - Interst - Principle -   Balance
  66      $4.04      $345.96     $730.28
  Month - Interst - Principle -   Balance
  67      $2.74      $347.26     $383.01
  Month - Interst - Principle -   Balance
  68      $1.44      $348.56     $34.45
  Month - Interst - Principle -   Balance
  69      $0.13      $349.87     ($315.42)
  </code></pre>
  <p>Can anyone help me get to 0?</p>