Subtract 20/9 from 90/42
1st number: 2 6/42, 2nd number: 2 2/9
90/42 - 20/9 is -5/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
90/42 = 90 × 3/42 × 3 = 270/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
20/9 = 20 × 14/9 × 14 = 280/126 - Subtract the two like fractions:
270/126 - 280/126 = 270 - 280/126 = -10/126 - After reducing the fraction, the answer is -5/63
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