Add 9/21 and 20/24
9/21 + 20/24 is 53/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
9/21 = 9 × 8/21 × 8 = 72/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
20/24 = 20 × 7/24 × 7 = 140/168 - Add the two like fractions:
72/168 + 140/168 = 72 + 140/168 = 212/168 - 212/168 simplified gives 53/42
- So, 9/21 + 20/24 = 53/42
In mixed form: 111/42
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