Subtract 18/7 from 40/20
1st number: 2 0/20, 2nd number: 2 4/7
40/20 - 18/7 is -4/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
40/20 = 40 × 7/20 × 7 = 280/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
18/7 = 18 × 20/7 × 20 = 360/140 - Subtract the two like fractions:
280/140 - 360/140 = 280 - 360/140 = -80/140 - After reducing the fraction, the answer is -4/7
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