Subtract 81/42 from 20/14
1st number: 1 6/14, 2nd number: 1 39/42
20/14 - 81/42 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
20/14 = 20 × 3/14 × 3 = 60/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
81/42 = 81 × 1/42 × 1 = 81/42 - Subtract the two like fractions:
60/42 - 81/42 = 60 - 81/42 = -21/42 - After reducing the fraction, the answer is -1/2
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