Subtract 20/6 from 18/27
1st number: 18/27, 2nd number: 3 2/6
18/27 - 20/6 is -8/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 6 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 27 × 2 = 54,
18/27 = 18 × 2/27 × 2 = 36/54 - Likewise, for the 2nd fraction, since 6 × 9 = 54,
20/6 = 20 × 9/6 × 9 = 180/54 - Subtract the two like fractions:
36/54 - 180/54 = 36 - 180/54 = -144/54 - After reducing the fraction, the answer is -8/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/27-20/6 18/27-40/6 18/54-20/6 18/27-20/12 54/27-20/6 18/27-60/6 18/81-20/6 18/27-20/18 90/27-20/6 18/27-20/30 18/27-20/42