Subtract 8/36 from 7/42
7/42 - 8/36 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
7/42 = 7 × 6/42 × 6 = 42/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
8/36 = 8 × 7/36 × 7 = 56/252 - Subtract the two like fractions:
42/252 - 56/252 = 42 - 56/252 = -14/252 - After reducing the fraction, the answer is -1/18
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