Subtract 1/56 from 21/81
21/81 - 1/56 is 365/1512.
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,
1/56 = 1 × 81/56 × 81 = 81/4536 - Subtract the two like fractions:
1176/4536 - 81/4536 = 1176 - 81/4536 = 1095/4536 - After reducing the fraction, the answer is 365/1512
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