Subtract 20/7 from 49/18
1st number: 2 13/18, 2nd number: 2 6/7
49/18 - 20/7 is -17/126.
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,
49/18 = 49 × 7/18 × 7 = 343/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
20/7 = 20 × 18/7 × 18 = 360/126 - Subtract the two like fractions:
343/126 - 360/126 = 343 - 360/126 = -17/126
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