Subtract 81/40 from 1/5
1st number: 1/5, 2nd number: 2 1/40
1/5 - 81/40 is -73/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
1/5 = 1 × 8/5 × 8 = 8/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Subtract the two like fractions:
8/40 - 81/40 = 8 - 81/40 = -73/40
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