Subtract 10/4 from 81/20
1st number: 4 1/20, 2nd number: 2 2/4
81/20 - 10/4 is 31/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 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 4 × 5 = 20,
10/4 = 10 × 5/4 × 5 = 50/20 - Subtract the two like fractions:
81/20 - 50/20 = 81 - 50/20 = 31/20 - In mixed form: 111/20
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