Subtract 18/7 from 20/8
1st number: 2 4/8, 2nd number: 2 4/7
20/8 - 18/7 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
18/7 = 18 × 8/7 × 8 = 144/56 - Subtract the two like fractions:
140/56 - 144/56 = 140 - 144/56 = -4/56 - After reducing the fraction, the answer is -1/14
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