Add 21/56 and 9/12
21/56 + 9/12 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 12 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
21/56 = 21 × 3/56 × 3 = 63/168 - Likewise, for the 2nd fraction, since 12 × 14 = 168,
9/12 = 9 × 14/12 × 14 = 126/168 - Add the two like fractions:
63/168 + 126/168 = 63 + 126/168 = 189/168 - 189/168 simplified gives 9/8
- So, 21/56 + 9/12 = 9/8
In mixed form: 11/8
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