Subtract 8/12 from 18/9
1st number: 2 0/9, 2nd number: 8/12
18/9 - 8/12 is 4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
8/12 = 8 × 3/12 × 3 = 24/36 - Subtract the two like fractions:
72/36 - 24/36 = 72 - 24/36 = 48/36 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9-8/12 18/9-16/12 18/9-8/24 54/9-8/12 18/9-24/12 18/27-8/12 18/9-8/36 90/9-8/12 18/9-40/12 18/45-8/12 18/9-8/60 18/9-56/12 18/63-8/12 18/9-8/84