Subtract 9/7 from 20/18
1st number: 1 2/18, 2nd number: 1 2/7
20/18 - 9/7 is -11/63.
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,
9/7 = 9 × 18/7 × 18 = 162/126 - Subtract the two like fractions:
140/126 - 162/126 = 140 - 162/126 = -22/126 - After reducing the fraction, the answer is -11/63
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