Subtract 81/8 from 90/10
1st number: 9 0/10, 2nd number: 10 1/8
90/10 - 81/8 is -9/8.
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,
90/10 = 90 × 4/10 × 4 = 360/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
81/8 = 81 × 5/8 × 5 = 405/40 - Subtract the two like fractions:
360/40 - 405/40 = 360 - 405/40 = -45/40 - After reducing the fraction, the answer is -9/8
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