Subtract 10/72 from 10/81
10/81 - 10/72 is -5/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 72 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
10/81 = 10 × 8/81 × 8 = 80/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
10/72 = 10 × 9/72 × 9 = 90/648 - Subtract the two like fractions:
80/648 - 90/648 = 80 - 90/648 = -10/648 - After reducing the fraction, the answer is -5/324
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