Subtract 12/9 from 28/36
1st number: 28/36, 2nd number: 1 3/9
28/36 - 12/9 is -5/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
28/36 = 28 × 1/36 × 1 = 28/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
12/9 = 12 × 4/9 × 4 = 48/36 - Subtract the two like fractions:
28/36 - 48/36 = 28 - 48/36 = -20/36 - After reducing the fraction, the answer is -5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/36-12/9 28/36-24/9 28/72-12/9 28/36-12/18 84/36-12/9 28/36-36/9 28/36-12/27 28/36-60/9 28/36-12/45 28/36-84/9 28/36-12/63