Subtract 14/18 from 20/30
20/30 - 14/18 is -1/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
20/30 = 20 × 3/30 × 3 = 60/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
14/18 = 14 × 5/18 × 5 = 70/90 - Subtract the two like fractions:
60/90 - 70/90 = 60 - 70/90 = -10/90 - After reducing the fraction, the answer is -1/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30-14/18 20/30-28/18 20/60-14/18 20/30-14/36 60/30-14/18 20/30-42/18 20/90-14/18 20/30-14/54 20/30-70/18 20/30-14/90 20/30-98/18