Subtract 15/18 from 1/7
1/7 - 15/18 is -29/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
1/7 = 1 × 18/7 × 18 = 18/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Subtract the two like fractions:
18/126 - 105/126 = 18 - 105/126 = -87/126 - After reducing the fraction, the answer is -29/42
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