Subtract 2/5 from 81/20
1st number: 4 1/20, 2nd number: 2/5
81/20 - 2/5 is 73/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 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 5 × 4 = 20,
2/5 = 2 × 4/5 × 4 = 8/20 - Subtract the two like fractions:
81/20 - 8/20 = 81 - 8/20 = 73/20 - In mixed form: 313/20
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