Subtract 18/36 from 8/84
8/84 - 18/36 is -17/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
8/84 = 8 × 3/84 × 3 = 24/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Subtract the two like fractions:
24/252 - 126/252 = 24 - 126/252 = -102/252 - After reducing the fraction, the answer is -17/42
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