Subtract 90/8 from 81/10
1st number: 8 1/10, 2nd number: 11 2/8
81/10 - 90/8 is -63/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
81/10 = 81 × 4/10 × 4 = 324/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Subtract the two like fractions:
324/40 - 450/40 = 324 - 450/40 = -126/40 - After reducing the fraction, the answer is -63/20
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