Subtract 81/20 from 9/5
1st number: 1 4/5, 2nd number: 4 1/20
9/5 - 81/20 is -9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
9/5 = 9 × 4/5 × 4 = 36/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Subtract the two like fractions:
36/20 - 81/20 = 36 - 81/20 = -45/20 - After reducing the fraction, the answer is -9/4
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