Subtract 81/12 from 7/20
1st number: 7/20, 2nd number: 6 9/12
7/20 - 81/12 is -32/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Subtract the two like fractions:
21/60 - 405/60 = 21 - 405/60 = -384/60 - After reducing the fraction, the answer is -32/5
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