Subtract 15/81 from 7/56
7/56 - 15/81 is -13/216.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 81 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 56 × 81 = 4536,
7/56 = 7 × 81/56 × 81 = 567/4536 - Likewise, for the 2nd fraction, since 81 × 56 = 4536,
15/81 = 15 × 56/81 × 56 = 840/4536 - Subtract the two like fractions:
567/4536 - 840/4536 = 567 - 840/4536 = -273/4536 - After reducing the fraction, the answer is -13/216
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