Add 21/24 and 18/28
21/24 + 18/28 is 85/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 28 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 28 × 6 = 168,
18/28 = 18 × 6/28 × 6 = 108/168 - Add the two like fractions:
147/168 + 108/168 = 147 + 108/168 = 255/168 - 255/168 simplified gives 85/56
- So, 21/24 + 18/28 = 85/56
In mixed form: 129/56
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