Subtract 1/18 from 27/20
1st number: 1 7/20, 2nd number: 1/18
27/20 - 1/18 is 233/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
27/20 = 27 × 9/20 × 9 = 243/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
1/18 = 1 × 10/18 × 10 = 10/180 - Subtract the two like fractions:
243/180 - 10/180 = 243 - 10/180 = 233/180 - In mixed form: 153/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/20-1/18 27/20-2/18 27/40-1/18 27/20-1/36 81/20-1/18 27/20-3/18 27/60-1/18 27/20-1/54 27/20-5/18 27/20-1/90 27/20-7/18