Subtract 36/81 from 7/24
7/24 - 36/81 is -11/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 24 × 27 = 648,
7/24 = 7 × 27/24 × 27 = 189/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
36/81 = 36 × 8/81 × 8 = 288/648 - Subtract the two like fractions:
189/648 - 288/648 = 189 - 288/648 = -99/648 - After reducing the fraction, the answer is -11/72
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