Subtract 81/80 from 56/90
1st number: 56/90, 2nd number: 1 1/80
56/90 - 81/80 is -281/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
56/90 = 56 × 8/90 × 8 = 448/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
81/80 = 81 × 9/80 × 9 = 729/720 - Subtract the two like fractions:
448/720 - 729/720 = 448 - 729/720 = -281/720
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