Subtract 81/8 from 90/28
1st number: 3 6/28, 2nd number: 10 1/8
90/28 - 81/8 is -387/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
90/28 = 90 × 2/28 × 2 = 180/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
81/8 = 81 × 7/8 × 7 = 567/56 - Subtract the two like fractions:
180/56 - 567/56 = 180 - 567/56 = -387/56
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