Subtract 90/18 from 20/6
1st number: 3 2/6, 2nd number: 5 0/18
20/6 - 90/18 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 6 × 3 = 18,
20/6 = 20 × 3/6 × 3 = 60/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
90/18 = 90 × 1/18 × 1 = 90/18 - Subtract the two like fractions:
60/18 - 90/18 = 60 - 90/18 = -30/18 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6-90/18 20/12-90/18 20/6-90/36 60/6-90/18 20/18-90/18 20/6-90/54 20/30-90/18 20/42-90/18