Subtract 3/81 from 18/12
1st number: 1 6/12, 2nd number: 3/81
18/12 - 3/81 is 79/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
18/12 = 18 × 27/12 × 27 = 486/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
3/81 = 3 × 4/81 × 4 = 12/324 - Subtract the two like fractions:
486/324 - 12/324 = 486 - 12/324 = 474/324 - After reducing the fraction, the answer is 79/54
- In mixed form: 125/54
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