Karan borrowed $3,650 for five months at an interest rate of 10%. She has to pay an equal amount every month. How much does she have to pay per month?
Give me a clear explanation. 
Karan's interest is $3,650 × 0.1 = $365.
In total Karan has to pay $3650 + $365 = $4015.
Every month she has to pay $4015 / 5 = $803.