Add 21/8 and 56/15
1st number: 2 5/8, 2nd number: 3 11/15
21/8 + 56/15 is 763/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
56/15 = 56 × 8/15 × 8 = 448/120 - Add the two like fractions:
315/120 + 448/120 = 315 + 448/120 = 763/120 - So, 21/8 + 56/15 = 763/120
In mixed form: 643/120
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