Subtract 81/21 from 54/24
1st number: 2 6/24, 2nd number: 3 18/21
54/24 - 81/21 is -45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
54/24 = 54 × 7/24 × 7 = 378/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
81/21 = 81 × 8/21 × 8 = 648/168 - Subtract the two like fractions:
378/168 - 648/168 = 378 - 648/168 = -270/168 - After reducing the fraction, the answer is -45/28
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