Subtract 40/84 from 12/54
12/54 - 40/84 is -16/63.
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,
12/54 = 12 × 14/54 × 14 = 168/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
40/84 = 40 × 9/84 × 9 = 360/756 - Subtract the two like fractions:
168/756 - 360/756 = 168 - 360/756 = -192/756 - After reducing the fraction, the answer is -16/63
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