Subtract 8/18 from 6/20
6/20 - 8/18 is -13/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
6/20 = 6 × 9/20 × 9 = 54/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
8/18 = 8 × 10/18 × 10 = 80/180 - Subtract the two like fractions:
54/180 - 80/180 = 54 - 80/180 = -26/180 - After reducing the fraction, the answer is -13/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20-8/18 6/20-16/18 6/40-8/18 6/20-8/36 18/20-8/18 6/20-24/18 6/60-8/18 6/20-8/54 30/20-8/18 6/20-40/18 6/20-8/90 42/20-8/18 6/20-56/18