Subtract 45/24 from 81/42
1st number: 1 39/42, 2nd number: 1 21/24
81/42 - 45/24 is 3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
81/42 = 81 × 4/42 × 4 = 324/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
45/24 = 45 × 7/24 × 7 = 315/168 - Subtract the two like fractions:
324/168 - 315/168 = 324 - 315/168 = 9/168 - After reducing the fraction, the answer is 3/56
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