Subtract 21/27 from 7/36
7/36 - 21/27 is -7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 36 × 3 = 108,
7/36 = 7 × 3/36 × 3 = 21/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
21/27 = 21 × 4/27 × 4 = 84/108 - Subtract the two like fractions:
21/108 - 84/108 = 21 - 84/108 = -63/108 - After reducing the fraction, the answer is -7/12
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