Subtract 6/81 from 7/9
7/9 - 6/81 is 19/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
7/9 = 7 × 9/9 × 9 = 63/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
6/81 = 6 × 1/81 × 1 = 6/81 - Subtract the two like fractions:
63/81 - 6/81 = 63 - 6/81 = 57/81 - After reducing the fraction, the answer is 19/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-6/81 7/9-12/81 7/18-6/81 21/9-6/81 7/9-18/81 7/27-6/81 35/9-6/81 7/9-30/81 7/45-6/81 49/9-6/81 7/9-42/81 7/63-6/81