Subtract 20/7 from 45/18
1st number: 2 9/18, 2nd number: 2 6/7
45/18 - 20/7 is -5/14.
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,
45/18 = 45 × 7/18 × 7 = 315/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
20/7 = 20 × 18/7 × 18 = 360/126 - Subtract the two like fractions:
315/126 - 360/126 = 315 - 360/126 = -45/126 - After reducing the fraction, the answer is -5/14
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