Subtract 81/84 from 42/54
42/54 - 81/84 is -47/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 54 × 14 = 756,
42/54 = 42 × 14/54 × 14 = 588/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
81/84 = 81 × 9/84 × 9 = 729/756 - Subtract the two like fractions:
588/756 - 729/756 = 588 - 729/756 = -141/756 - After reducing the fraction, the answer is -47/252
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Related: 84/54-81/84