Subtract 90/70 from 81/56
1st number: 1 25/56, 2nd number: 1 20/70
81/56 - 90/70 is 9/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
81/56 = 81 × 5/56 × 5 = 405/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
90/70 = 90 × 4/70 × 4 = 360/280 - Subtract the two like fractions:
405/280 - 360/280 = 405 - 360/280 = 45/280 - After reducing the fraction, the answer is 9/56
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