Subtract 1/81 from 2/8
2/8 - 1/81 is 77/324.
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,
2/8 = 2 × 81/8 × 81 = 162/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
1/81 = 1 × 8/81 × 8 = 8/648 - Subtract the two like fractions:
162/648 - 8/648 = 162 - 8/648 = 154/648 - After reducing the fraction, the answer is 77/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-1/81 2/8-2/81 2/16-1/81 6/8-1/81 2/8-3/81 2/24-1/81 10/8-1/81 2/8-5/81 2/40-1/81 14/8-1/81 2/8-7/81 2/56-1/81