Subtract 3/18 from 20/90
20/90 - 3/18 is 1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
3/18 = 3 × 5/18 × 5 = 15/90 - Subtract the two like fractions:
20/90 - 15/90 = 20 - 15/90 = 5/90 - After reducing the fraction, the answer is 1/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-3/18 20/90-6/18 20/90-3/36 60/90-3/18 20/90-9/18 20/90-3/54 20/90-15/18 20/90-3/90 20/90-21/18