Subtract 27/20 from 27/18
1st number: 1 9/18, 2nd number: 1 7/20
27/18 - 27/20 is 3/20.
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,
27/18 = 27 × 10/18 × 10 = 270/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
27/20 = 27 × 9/20 × 9 = 243/180 - Subtract the two like fractions:
270/180 - 243/180 = 270 - 243/180 = 27/180 - After reducing the fraction, the answer is 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-27/20 27/18-54/20 27/36-27/20 27/18-27/40 81/18-27/20 27/18-81/20 27/54-27/20 27/18-27/60 27/90-27/20