Subtract 7/56 from 81/90
81/90 - 7/56 is 31/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
81/90 = 81 × 28/90 × 28 = 2268/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
7/56 = 7 × 45/56 × 45 = 315/2520 - Subtract the two like fractions:
2268/2520 - 315/2520 = 2268 - 315/2520 = 1953/2520 - After reducing the fraction, the answer is 31/40
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