Subtract 12/90 from 20/3
1st number: 6 2/3, 2nd number: 12/90
20/3 - 12/90 is 98/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
20/3 = 20 × 30/3 × 30 = 600/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Subtract the two like fractions:
600/90 - 12/90 = 600 - 12/90 = 588/90 - After reducing the fraction, the answer is 98/15
- In mixed form: 68/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/3-12/90 20/3-24/90 20/6-12/90 60/3-12/90 20/3-36/90 20/9-12/90 20/3-60/90 20/15-12/90 20/3-84/90 20/21-12/90