Subtract 21/20 from 1/4
1st number: 1/4, 2nd number: 1 1/20
1/4 - 21/20 is -4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
1/4 = 1 × 5/4 × 5 = 5/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Subtract the two like fractions:
5/20 - 21/20 = 5 - 21/20 = -16/20 - After reducing the fraction, the answer is -4/5
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