Subtract 81/7 from 20/18
1st number: 1 2/18, 2nd number: 11 4/7
20/18 - 81/7 is -659/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
81/7 = 81 × 18/7 × 18 = 1458/126 - Subtract the two like fractions:
140/126 - 1458/126 = 140 - 1458/126 = -1318/126 - After reducing the fraction, the answer is -659/63
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