Subtract 21/20 from 3/10
1st number: 3/10, 2nd number: 1 1/20
3/10 - 21/20 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
3/10 = 3 × 2/10 × 2 = 6/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Subtract the two like fractions:
6/20 - 21/20 = 6 - 21/20 = -15/20 - After reducing the fraction, the answer is -3/4
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