Subtract 81/24 from 1/21
1st number: 1/21, 2nd number: 3 9/24
1/21 - 81/24 is -559/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
81/24 = 81 × 7/24 × 7 = 567/168 - Subtract the two like fractions:
8/168 - 567/168 = 8 - 567/168 = -559/168
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