Subtract 81/18 from 1/5
1st number: 1/5, 2nd number: 4 9/18
1/5 - 81/18 is -43/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
1/5 = 1 × 18/5 × 18 = 18/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
81/18 = 81 × 5/18 × 5 = 405/90 - Subtract the two like fractions:
18/90 - 405/90 = 18 - 405/90 = -387/90 - After reducing the fraction, the answer is -43/10
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