Subtract 90/84 from 18/56
1st number: 18/56, 2nd number: 1 6/84
18/56 - 90/84 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
18/56 = 18 × 3/56 × 3 = 54/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
90/84 = 90 × 2/84 × 2 = 180/168 - Subtract the two like fractions:
54/168 - 180/168 = 54 - 180/168 = -126/168 - After reducing the fraction, the answer is -3/4
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