Subtract 81/15 from 2/40
1st number: 2/40, 2nd number: 5 6/15
2/40 - 81/15 is -107/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
2/40 = 2 × 3/40 × 3 = 6/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
81/15 = 81 × 8/15 × 8 = 648/120 - Subtract the two like fractions:
6/120 - 648/120 = 6 - 648/120 = -642/120 - After reducing the fraction, the answer is -107/20
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