Subtract 20/7 from 18/8
1st number: 2 2/8, 2nd number: 2 6/7
18/8 - 20/7 is -17/28.
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,
18/8 = 18 × 7/8 × 7 = 126/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
20/7 = 20 × 8/7 × 8 = 160/56 - Subtract the two like fractions:
126/56 - 160/56 = 126 - 160/56 = -34/56 - After reducing the fraction, the answer is -17/28
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