Subtract 90/5 from 1/81
1st number: 1/81, 2nd number: 18 0/5
1/81 - 90/5 is -1457/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 5 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
1/81 = 1 × 5/81 × 5 = 5/405 - Likewise, for the 2nd fraction, since 5 × 81 = 405,
90/5 = 90 × 81/5 × 81 = 7290/405 - Subtract the two like fractions:
5/405 - 7290/405 = 5 - 7290/405 = -7285/405 - After reducing the fraction, the answer is -1457/81
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