Subtract 8/81 from 6/7
6/7 - 8/81 is 430/567.
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,
6/7 = 6 × 81/7 × 81 = 486/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
8/81 = 8 × 7/81 × 7 = 56/567 - Subtract the two like fractions:
486/567 - 56/567 = 486 - 56/567 = 430/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/7-8/81 6/7-16/81 6/14-8/81 18/7-8/81 6/7-24/81 6/21-8/81 30/7-8/81 6/7-40/81 6/35-8/81 42/7-8/81 6/7-56/81 6/49-8/81