Add 21/28 and 45/56
21/28 + 45/56 is 87/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
21/28 = 21 × 2/28 × 2 = 42/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
45/56 = 45 × 1/56 × 1 = 45/56 - Add the two like fractions:
42/56 + 45/56 = 42 + 45/56 = 87/56 - So, 21/28 + 45/56 = 87/56
In mixed form: 131/56
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