Subtract 21/24 from 35/72
35/72 - 21/24 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
35/72 = 35 × 1/72 × 1 = 35/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
21/24 = 21 × 3/24 × 3 = 63/72 - Subtract the two like fractions:
35/72 - 63/72 = 35 - 63/72 = -28/72 - After reducing the fraction, the answer is -7/18
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