Subtract 4/21 from 21/36
21/36 - 4/21 is 11/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
4/21 = 4 × 12/21 × 12 = 48/252 - Subtract the two like fractions:
147/252 - 48/252 = 147 - 48/252 = 99/252 - After reducing the fraction, the answer is 11/28
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