Subtract 81/6 from 21/20
1st number: 1 1/20, 2nd number: 13 3/6
21/20 - 81/6 is -249/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 6 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Likewise, for the 2nd fraction, since 6 × 10 = 60,
81/6 = 81 × 10/6 × 10 = 810/60 - Subtract the two like fractions:
63/60 - 810/60 = 63 - 810/60 = -747/60 - After reducing the fraction, the answer is -249/20
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