Subtract 81/8 from 15/90
1st number: 15/90, 2nd number: 10 1/8
15/90 - 81/8 is -239/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
81/8 = 81 × 45/8 × 45 = 3645/360 - Subtract the two like fractions:
60/360 - 3645/360 = 60 - 3645/360 = -3585/360 - After reducing the fraction, the answer is -239/24
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