Subtract 8/5 from 18/40
1st number: 18/40, 2nd number: 1 3/5
18/40 - 8/5 is -23/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
8/5 = 8 × 8/5 × 8 = 64/40 - Subtract the two like fractions:
18/40 - 64/40 = 18 - 64/40 = -46/40 - After reducing the fraction, the answer is -23/20
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