Add 15/21 and 10/28
15/21 + 10/28 is 15/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
15/21 = 15 × 4/21 × 4 = 60/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
10/28 = 10 × 3/28 × 3 = 30/84 - Add the two like fractions:
60/84 + 30/84 = 60 + 30/84 = 90/84 - 90/84 simplified gives 15/14
- So, 15/21 + 10/28 = 15/14
In mixed form: 11/14
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