Subtract 90/12 from 1/81
1st number: 1/81, 2nd number: 7 6/12
1/81 - 90/12 is -1213/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 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 12 × 27 = 324,
90/12 = 90 × 27/12 × 27 = 2430/324 - Subtract the two like fractions:
4/324 - 2430/324 = 4 - 2430/324 = -2426/324 - After reducing the fraction, the answer is -1213/162
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