Subtract 20/5 from 18/20
1st number: 18/20, 2nd number: 4 0/5
18/20 - 20/5 is -31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
18/20 = 18 × 1/20 × 1 = 18/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
20/5 = 20 × 4/5 × 4 = 80/20 - Subtract the two like fractions:
18/20 - 80/20 = 18 - 80/20 = -62/20 - After reducing the fraction, the answer is -31/10
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