Add 21/28 and 15/24
21/28 + 15/24 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 28 × 6 = 168,
21/28 = 21 × 6/28 × 6 = 126/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
15/24 = 15 × 7/24 × 7 = 105/168 - Add the two like fractions:
126/168 + 105/168 = 126 + 105/168 = 231/168 - 231/168 simplified gives 11/8
- So, 21/28 + 15/24 = 11/8
In mixed form: 13/8
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