Subtract 18/8 from 2/7
1st number: 2/7, 2nd number: 2 2/8
2/7 - 18/8 is -55/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
2/7 = 2 × 8/7 × 8 = 16/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Subtract the two like fractions:
16/56 - 126/56 = 16 - 126/56 = -110/56 - After reducing the fraction, the answer is -55/28
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