Subtract 90/5 from 20/15
1st number: 1 5/15, 2nd number: 18 0/5
20/15 - 90/5 is -50/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 15 × 1 = 15,
20/15 = 20 × 1/15 × 1 = 20/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
90/5 = 90 × 3/5 × 3 = 270/15 - Subtract the two like fractions:
20/15 - 270/15 = 20 - 270/15 = -250/15 - After reducing the fraction, the answer is -50/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-90/5 20/30-90/5 20/15-90/10 60/15-90/5 20/45-90/5 20/15-90/15 20/75-90/5 20/15-90/25 20/15-90/35