Subtract 25/81 from 1/8
1/8 - 25/81 is -119/648.
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,
1/8 = 1 × 81/8 × 81 = 81/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
25/81 = 25 × 8/81 × 8 = 200/648 - Subtract the two like fractions:
81/648 - 200/648 = 81 - 200/648 = -119/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/8-25/81 1/8-50/81 1/16-25/81 3/8-25/81 1/8-75/81 1/24-25/81 5/8-25/81 1/40-25/81 7/8-25/81 1/56-25/81