Subtract 10/90 from 20/15
1st number: 1 5/15, 2nd number: 10/90
20/15 - 10/90 is 11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
20/15 = 20 × 6/15 × 6 = 120/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Subtract the two like fractions:
120/90 - 10/90 = 120 - 10/90 = 110/90 - After reducing the fraction, the answer is 11/9
- In mixed form: 12/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-10/90 20/15-20/90 20/30-10/90 60/15-10/90 20/15-30/90 20/45-10/90 20/15-50/90 20/75-10/90 20/15-70/90