Subtract 72/42 from 81/8
1st number: 10 1/8, 2nd number: 1 30/42
81/8 - 72/42 is 471/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
81/8 = 81 × 21/8 × 21 = 1701/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
72/42 = 72 × 4/42 × 4 = 288/168 - Subtract the two like fractions:
1701/168 - 288/168 = 1701 - 288/168 = 1413/168 - After reducing the fraction, the answer is 471/56
- In mixed form: 823/56
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