Subtract 21/36 from 10/21
10/21 - 21/36 is -3/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
10/21 = 10 × 12/21 × 12 = 120/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Subtract the two like fractions:
120/252 - 147/252 = 120 - 147/252 = -27/252 - After reducing the fraction, the answer is -3/28
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