Subtract 90/9 from 81/60
1st number: 1 21/60, 2nd number: 10 0/9
81/60 - 90/9 is -173/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
81/60 = 81 × 3/60 × 3 = 243/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
90/9 = 90 × 20/9 × 20 = 1800/180 - Subtract the two like fractions:
243/180 - 1800/180 = 243 - 1800/180 = -1557/180 - After reducing the fraction, the answer is -173/20
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