Subtract 5/72 from 2/81
2/81 - 5/72 is -29/648.
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,
2/81 = 2 × 8/81 × 8 = 16/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
5/72 = 5 × 9/72 × 9 = 45/648 - Subtract the two like fractions:
16/648 - 45/648 = 16 - 45/648 = -29/648
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