Add 27/28 and 7/21
27/28 + 7/21 is 109/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
27/28 = 27 × 3/28 × 3 = 81/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
7/21 = 7 × 4/21 × 4 = 28/84 - Add the two like fractions:
81/84 + 28/84 = 81 + 28/84 = 109/84 - So, 27/28 + 7/21 = 109/84
In mixed form: 125/84
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