Add 21/12 and 72/56
1st number: 1 9/12, 2nd number: 1 16/56
21/12 + 72/56 is 85/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 12 × 14 = 168,
21/12 = 21 × 14/12 × 14 = 294/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
72/56 = 72 × 3/56 × 3 = 216/168 - Add the two like fractions:
294/168 + 216/168 = 294 + 216/168 = 510/168 - 510/168 simplified gives 85/28
- So, 21/12 + 72/56 = 85/28
In mixed form: 31/28
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