Subtract 20/27 from 3/18
3/18 - 20/27 is -31/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
3/18 = 3 × 3/18 × 3 = 9/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
20/27 = 20 × 2/27 × 2 = 40/54 - Subtract the two like fractions:
9/54 - 40/54 = 9 - 40/54 = -31/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-20/27 3/18-40/27 3/36-20/27 3/18-20/54 9/18-20/27 3/18-60/27 3/54-20/27 3/18-20/81 15/18-20/27 3/90-20/27 21/18-20/27