Subtract 90/42 from 81/8
1st number: 10 1/8, 2nd number: 2 6/42
81/8 - 90/42 is 447/56.
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,
90/42 = 90 × 4/42 × 4 = 360/168 - Subtract the two like fractions:
1701/168 - 360/168 = 1701 - 360/168 = 1341/168 - After reducing the fraction, the answer is 447/56
- In mixed form: 755/56
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