Subtract 90/42 from 45/24
1st number: 1 21/24, 2nd number: 2 6/42
45/24 - 90/42 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
45/24 = 45 × 7/24 × 7 = 315/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
90/42 = 90 × 4/42 × 4 = 360/168 - Subtract the two like fractions:
315/168 - 360/168 = 315 - 360/168 = -45/168 - After reducing the fraction, the answer is -15/56
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