Subtract 5/56 from 21/81
21/81 - 5/56 is 257/1512.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 56 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 81 × 56 = 4536,
21/81 = 21 × 56/81 × 56 = 1176/4536 - Likewise, for the 2nd fraction, since 56 × 81 = 4536,
5/56 = 5 × 81/56 × 81 = 405/4536 - Subtract the two like fractions:
1176/4536 - 405/4536 = 1176 - 405/4536 = 771/4536 - After reducing the fraction, the answer is 257/1512
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