Subtract 1/24 from 21/81
21/81 - 1/24 is 47/216.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 24 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
21/81 = 21 × 8/81 × 8 = 168/648 - Likewise, for the 2nd fraction, since 24 × 27 = 648,
1/24 = 1 × 27/24 × 27 = 27/648 - Subtract the two like fractions:
168/648 - 27/648 = 168 - 27/648 = 141/648 - After reducing the fraction, the answer is 47/216
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