Subtract 90/50 from 20/15
1st number: 1 5/15, 2nd number: 1 40/50
20/15 - 90/50 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 50 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 15 × 10 = 150,
20/15 = 20 × 10/15 × 10 = 200/150 - Likewise, for the 2nd fraction, since 50 × 3 = 150,
90/50 = 90 × 3/50 × 3 = 270/150 - Subtract the two like fractions:
200/150 - 270/150 = 200 - 270/150 = -70/150 - After reducing the fraction, the answer is -7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-90/50 20/30-90/50 60/15-90/50 20/45-90/50 20/75-90/50