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