Subtract 3/10 from 81/20
1st number: 4 1/20, 2nd number: 3/10
81/20 - 3/10 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
3/10 = 3 × 2/10 × 2 = 6/20 - Subtract the two like fractions:
81/20 - 6/20 = 81 - 6/20 = 75/20 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
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