Subtract 81/40 from 8/20
1st number: 8/20, 2nd number: 2 1/40
8/20 - 81/40 is -13/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
8/20 = 8 × 2/20 × 2 = 16/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Subtract the two like fractions:
16/40 - 81/40 = 16 - 81/40 = -65/40 - After reducing the fraction, the answer is -13/8
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