Subtract 10/81 from 84/72
1st number: 1 12/72, 2nd number: 10/81
84/72 - 10/81 is 169/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
84/72 = 84 × 9/72 × 9 = 756/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
10/81 = 10 × 8/81 × 8 = 80/648 - Subtract the two like fractions:
756/648 - 80/648 = 756 - 80/648 = 676/648 - After reducing the fraction, the answer is 169/162
- In mixed form: 17/162
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