Subtract 81/20 from 2/4
1st number: 2/4, 2nd number: 4 1/20
2/4 - 81/20 is -71/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
2/4 = 2 × 5/4 × 5 = 10/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Subtract the two like fractions:
10/20 - 81/20 = 10 - 81/20 = -71/20
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