Subtract 8/81 from 2/7
2/7 - 8/81 is 106/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
2/7 = 2 × 81/7 × 81 = 162/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
8/81 = 8 × 7/81 × 7 = 56/567 - Subtract the two like fractions:
162/567 - 56/567 = 162 - 56/567 = 106/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-8/81 2/7-16/81 2/14-8/81 6/7-8/81 2/7-24/81 2/21-8/81 10/7-8/81 2/7-40/81 2/35-8/81 14/7-8/81 2/7-56/81 2/49-8/81