Subtract 10/81 from 1/72
1/72 - 10/81 is -71/648.
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,
1/72 = 1 × 9/72 × 9 = 9/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
10/81 = 10 × 8/81 × 8 = 80/648 - Subtract the two like fractions:
9/648 - 80/648 = 9 - 80/648 = -71/648
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