Subtract 42/84 from 7/54
7/54 - 42/84 is -10/27.
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,
7/54 = 7 × 14/54 × 14 = 98/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
42/84 = 42 × 9/84 × 9 = 378/756 - Subtract the two like fractions:
98/756 - 378/756 = 98 - 378/756 = -280/756 - After reducing the fraction, the answer is -10/27
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