Subtract 9/81 from 6/8
6/8 - 9/81 is 23/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
6/8 = 6 × 81/8 × 81 = 486/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
9/81 = 9 × 8/81 × 8 = 72/648 - Subtract the two like fractions:
486/648 - 72/648 = 486 - 72/648 = 414/648 - After reducing the fraction, the answer is 23/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/8-9/81 6/8-18/81 6/16-9/81 18/8-9/81 6/8-27/81 6/24-9/81 30/8-9/81 6/8-45/81 6/40-9/81 42/8-9/81 6/8-63/81 6/56-9/81