Subtract 10/40 from 3/20
3/20 - 10/40 is -1/10.
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,
3/20 = 3 × 2/20 × 2 = 6/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
10/40 = 10 × 1/40 × 1 = 10/40 - Subtract the two like fractions:
6/40 - 10/40 = 6 - 10/40 = -4/40 - After reducing the fraction, the answer is -1/10
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