Subtract 20/30 from 20/27
20/27 - 20/30 is 2/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
20/27 = 20 × 10/27 × 10 = 200/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
20/30 = 20 × 9/30 × 9 = 180/270 - Subtract the two like fractions:
200/270 - 180/270 = 200 - 180/270 = 20/270 - After reducing the fraction, the answer is 2/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-20/30 20/27-40/30 20/54-20/30 20/27-20/60 60/27-20/30 20/27-60/30 20/81-20/30 20/27-20/90