Subtract 12/20 from 30/9
1st number: 3 3/9, 2nd number: 12/20
30/9 - 12/20 is 41/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
30/9 = 30 × 20/9 × 20 = 600/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Subtract the two like fractions:
600/180 - 108/180 = 600 - 108/180 = 492/180 - After reducing the fraction, the answer is 41/15
- In mixed form: 211/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9-12/20 30/9-24/20 30/18-12/20 30/9-12/40 90/9-12/20 30/9-36/20 30/27-12/20 30/9-12/60 30/9-60/20 30/45-12/20 30/9-84/20 30/63-12/20