Subtract 90/7 from 81/10
1st number: 8 1/10, 2nd number: 12 6/7
81/10 - 90/7 is -333/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
81/10 = 81 × 7/10 × 7 = 567/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
90/7 = 90 × 10/7 × 10 = 900/70 - Subtract the two like fractions:
567/70 - 900/70 = 567 - 900/70 = -333/70
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