Subtract 7/9 from 8/18
8/18 - 7/9 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
8/18 = 8 × 1/18 × 1 = 8/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
7/9 = 7 × 2/9 × 2 = 14/18 - Subtract the two like fractions:
8/18 - 14/18 = 8 - 14/18 = -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: 16/18-7/9 8/18-14/9 8/36-7/9 8/18-7/18 24/18-7/9 8/18-21/9 8/54-7/9 8/18-7/27 40/18-7/9 8/18-35/9 8/90-7/9 8/18-7/45 56/18-7/9 8/18-49/9 8/18-7/63