Subtract 7/56 from 1/81
1/81 - 7/56 is -73/648.
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,
1/81 = 1 × 56/81 × 56 = 56/4536 - Likewise, for the 2nd fraction, since 56 × 81 = 4536,
7/56 = 7 × 81/56 × 81 = 567/4536 - Subtract the two like fractions:
56/4536 - 567/4536 = 56 - 567/4536 = -511/4536 - After reducing the fraction, the answer is -73/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81-7/56 1/81-14/56 3/81-7/56 1/81-21/56 5/81-7/56 1/81-35/56 7/81-7/56 1/81-49/56