Subtract 49/18 from 20/15
1st number: 1 5/15, 2nd number: 2 13/18
20/15 - 49/18 is -25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 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 18 × 5 = 90,
49/18 = 49 × 5/18 × 5 = 245/90 - Subtract the two like fractions:
120/90 - 245/90 = 120 - 245/90 = -125/90 - After reducing the fraction, the answer is -25/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-49/18 20/15-98/18 20/30-49/18 20/15-49/36 60/15-49/18 20/45-49/18 20/15-49/54 20/75-49/18 20/15-49/90