Subtract 6/20 from 5/18
5/18 - 6/20 is -1/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
5/18 = 5 × 10/18 × 10 = 50/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
6/20 = 6 × 9/20 × 9 = 54/180 - Subtract the two like fractions:
50/180 - 54/180 = 50 - 54/180 = -4/180 - After reducing the fraction, the answer is -1/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-6/20 5/18-12/20 5/36-6/20 5/18-6/40 15/18-6/20 5/18-18/20 5/54-6/20 5/18-6/60 25/18-6/20 5/18-30/20 5/90-6/20 35/18-6/20 5/18-42/20