Solutions by everydaycalculation.com

1st number: 10/45, 2nd number: 1 1/20

10/45 + 21/20 is 229/180.

1. Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
2. For the 1st fraction, since 45 × 4 = 180,
10/45 = 10 × 4/45 × 4 = 40/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180
40/180 + 189/180 = 40 + 189/180 = 229/180
5. So, 10/45 + 21/20 = 229/180
In mixed form: 149/180

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