Subtract 21/14 from 7/18
1st number: 7/18, 2nd number: 1 7/14
7/18 - 21/14 is -10/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 14 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 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126 - Subtract the two like fractions:
49/126 - 189/126 = 49 - 189/126 = -140/126 - After reducing the fraction, the answer is -10/9
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