Subtract 90/42 from 45/28
1st number: 1 17/28, 2nd number: 2 6/42
45/28 - 90/42 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
45/28 = 45 × 3/28 × 3 = 135/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
90/42 = 90 × 2/42 × 2 = 180/84 - Subtract the two like fractions:
135/84 - 180/84 = 135 - 180/84 = -45/84 - After reducing the fraction, the answer is -15/28
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