Subtract 9/18 from 12/9
1st number: 1 3/9, 2nd number: 9/18
12/9 - 9/18 is 5/6.
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,
12/9 = 12 × 2/9 × 2 = 24/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
9/18 = 9 × 1/18 × 1 = 9/18 - Subtract the two like fractions:
24/18 - 9/18 = 24 - 9/18 = 15/18 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9-9/18 12/18-9/18 12/9-9/36 36/9-9/18 12/9-27/18 12/27-9/18 12/9-9/54 60/9-9/18 12/9-45/18 12/45-9/18 12/9-9/90 84/9-9/18 12/9-63/18 12/63-9/18