Subtract 27/36 from 6/21
6/21 - 27/36 is -13/28.
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,
6/21 = 6 × 12/21 × 12 = 72/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
27/36 = 27 × 7/36 × 7 = 189/252 - Subtract the two like fractions:
72/252 - 189/252 = 72 - 189/252 = -117/252 - After reducing the fraction, the answer is -13/28
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