Solutions by everydaycalculation.com

1st number: 1 12/15, 2nd number: 1 30/40

27/15 + 70/40 is 71/20.

1. Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
2. For the 1st fraction, since 15 × 8 = 120,
27/15 = 27 × 8/15 × 8 = 216/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
70/40 = 70 × 3/40 × 3 = 210/120
216/120 + 210/120 = 216 + 210/120 = 426/120
5. After reducing the fraction, the answer is 71/20
6. In mixed form: 311/20

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