Subtract 45/42 from 7/18
1st number: 7/18, 2nd number: 1 3/42
7/18 - 45/42 is -43/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
7/18 = 7 × 7/18 × 7 = 49/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
45/42 = 45 × 3/42 × 3 = 135/126 - Subtract the two like fractions:
49/126 - 135/126 = 49 - 135/126 = -86/126 - After reducing the fraction, the answer is -43/63
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