Subtract 9/42 from 20/24
20/24 - 9/42 is 13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 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 42 × 4 = 168,
9/42 = 9 × 4/42 × 4 = 36/168 - Subtract the two like fractions:
140/168 - 36/168 = 140 - 36/168 = 104/168 - After reducing the fraction, the answer is 13/21
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