Subtract 7/81 from 30/12
1st number: 2 6/12, 2nd number: 7/81
30/12 - 7/81 is 391/162.
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,
30/12 = 30 × 27/12 × 27 = 810/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
7/81 = 7 × 4/81 × 4 = 28/324 - Subtract the two like fractions:
810/324 - 28/324 = 810 - 28/324 = 782/324 - After reducing the fraction, the answer is 391/162
- In mixed form: 267/162
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