Add 21/28 and 28/54
21/28 + 28/54 is 137/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
21/28 = 21 × 27/28 × 27 = 567/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
28/54 = 28 × 14/54 × 14 = 392/756 - Add the two like fractions:
567/756 + 392/756 = 567 + 392/756 = 959/756 - 959/756 simplified gives 137/108
- So, 21/28 + 28/54 = 137/108
In mixed form: 129/108
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