Subtract 90/4 from 1/81
1st number: 1/81, 2nd number: 22 2/4
1/81 - 90/4 is -3643/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
1/81 = 1 × 4/81 × 4 = 4/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
90/4 = 90 × 81/4 × 81 = 7290/324 - Subtract the two like fractions:
4/324 - 7290/324 = 4 - 7290/324 = -7286/324 - After reducing the fraction, the answer is -3643/162
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