Subtract 9/18 from 20/84
20/84 - 9/18 is -11/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
9/18 = 9 × 14/18 × 14 = 126/252 - Subtract the two like fractions:
60/252 - 126/252 = 60 - 126/252 = -66/252 - After reducing the fraction, the answer is -11/42
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