Subtract 10/72 from 81/42
1st number: 1 39/42, 2nd number: 10/72
81/42 - 10/72 is 451/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
81/42 = 81 × 12/42 × 12 = 972/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Subtract the two like fractions:
972/504 - 70/504 = 972 - 70/504 = 902/504 - After reducing the fraction, the answer is 451/252
- In mixed form: 1199/252
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