Add 21/27 and 9/28
21/27 + 9/28 is 277/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
21/27 = 21 × 28/27 × 28 = 588/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
9/28 = 9 × 27/28 × 27 = 243/756 - Add the two like fractions:
588/756 + 243/756 = 588 + 243/756 = 831/756 - 831/756 simplified gives 277/252
- So, 21/27 + 9/28 = 277/252
In mixed form: 125/252
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