Subtract 81/10 from 15/20
1st number: 15/20, 2nd number: 8 1/10
15/20 - 81/10 is -147/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
81/10 = 81 × 2/10 × 2 = 162/20 - Subtract the two like fractions:
15/20 - 162/20 = 15 - 162/20 = -147/20
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