Subtract 4/20 from 21/10
1st number: 2 1/10, 2nd number: 4/20
21/10 - 4/20 is 19/10.
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,
21/10 = 21 × 2/10 × 2 = 42/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
4/20 = 4 × 1/20 × 1 = 4/20 - Subtract the two like fractions:
42/20 - 4/20 = 42 - 4/20 = 38/20 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
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