Subtract 12/9 from 30/36
1st number: 30/36, 2nd number: 1 3/9
30/36 - 12/9 is -1/2.
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,
30/36 = 30 × 1/36 × 1 = 30/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
12/9 = 12 × 4/9 × 4 = 48/36 - Subtract the two like fractions:
30/36 - 48/36 = 30 - 48/36 = -18/36 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/36-12/9 30/36-24/9 30/72-12/9 30/36-12/18 90/36-12/9 30/36-36/9 30/36-12/27 30/36-60/9 30/36-12/45 30/36-84/9 30/36-12/63