Subtract 2/81 from 12/72
12/72 - 2/81 is 23/162.
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,
12/72 = 12 × 9/72 × 9 = 108/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
2/81 = 2 × 8/81 × 8 = 16/648 - Subtract the two like fractions:
108/648 - 16/648 = 108 - 16/648 = 92/648 - After reducing the fraction, the answer is 23/162
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