Subtract 49/81 from 7/8
7/8 - 49/81 is 175/648.
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,
7/8 = 7 × 81/8 × 81 = 567/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
49/81 = 49 × 8/81 × 8 = 392/648 - Subtract the two like fractions:
567/648 - 392/648 = 567 - 392/648 = 175/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-49/81 7/8-98/81 7/16-49/81 21/8-49/81 7/24-49/81 35/8-49/81 7/40-49/81 49/8-49/81 7/56-49/81