Subtract 12/7 from 20/40
1st number: 20/40, 2nd number: 1 5/7
20/40 - 12/7 is -17/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
12/7 = 12 × 40/7 × 40 = 480/280 - Subtract the two like fractions:
140/280 - 480/280 = 140 - 480/280 = -340/280 - After reducing the fraction, the answer is -17/14
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