Subtract 20/18 from 30/3
1st number: 10 0/3, 2nd number: 1 2/18
30/3 - 20/18 is 80/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 3 × 6 = 18,
30/3 = 30 × 6/3 × 6 = 180/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
20/18 = 20 × 1/18 × 1 = 20/18 - Subtract the two like fractions:
180/18 - 20/18 = 180 - 20/18 = 160/18 - After reducing the fraction, the answer is 80/9
- In mixed form: 88/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/3-20/18 30/3-40/18 30/6-20/18 30/3-20/36 90/3-20/18 30/3-60/18 30/9-20/18 30/3-20/54 30/15-20/18 30/3-20/90 30/21-20/18