Subtract 8/18 from 7/9
7/9 - 8/18 is 1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
7/9 = 7 × 2/9 × 2 = 14/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
8/18 = 8 × 1/18 × 1 = 8/18 - Subtract the two like fractions:
14/18 - 8/18 = 14 - 8/18 = 6/18 - After reducing the fraction, the answer is 1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-8/18 7/9-16/18 7/18-8/18 7/9-8/36 21/9-8/18 7/9-24/18 7/27-8/18 7/9-8/54 35/9-8/18 7/9-40/18 7/45-8/18 7/9-8/90 49/9-8/18 7/9-56/18 7/63-8/18