Subtract 3/9 from 12/18
12/18 - 3/9 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,
12/18 = 12 × 1/18 × 1 = 12/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
3/9 = 3 × 2/9 × 2 = 6/18 - Subtract the two like fractions:
12/18 - 6/18 = 12 - 6/18 = 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: 24/18-3/9 12/18-6/9 12/36-3/9 12/18-3/18 36/18-3/9 12/54-3/9 12/18-3/27 60/18-3/9 12/18-15/9 12/90-3/9 12/18-3/45 84/18-3/9 12/18-21/9 12/18-3/63