Subtract 90/42 from 90/56
1st number: 1 34/56, 2nd number: 2 6/42
90/56 - 90/42 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
90/42 = 90 × 4/42 × 4 = 360/168 - Subtract the two like fractions:
270/168 - 360/168 = 270 - 360/168 = -90/168 - After reducing the fraction, the answer is -15/28
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