Subtract 10/18 from 9/42
9/42 - 10/18 is -43/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
9/42 = 9 × 3/42 × 3 = 27/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Subtract the two like fractions:
27/126 - 70/126 = 27 - 70/126 = -43/126
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