Add 21/12 and 84/56
1st number: 1 9/12, 2nd number: 1 28/56
21/12 + 84/56 is 13/4.
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,
84/56 = 84 × 3/56 × 3 = 252/168 - Add the two like fractions:
294/168 + 252/168 = 294 + 252/168 = 546/168 - 546/168 simplified gives 13/4
- So, 21/12 + 84/56 = 13/4
In mixed form: 31/4
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