Subtract 21/5 from 40/20
1st number: 2 0/20, 2nd number: 4 1/5
40/20 - 21/5 is -11/5.
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,
40/20 = 40 × 1/20 × 1 = 40/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
21/5 = 21 × 4/5 × 4 = 84/20 - Subtract the two like fractions:
40/20 - 84/20 = 40 - 84/20 = -44/20 - After reducing the fraction, the answer is -11/5
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