Subtract 1/20 from 20/9
1st number: 2 2/9, 2nd number: 1/20
20/9 - 1/20 is 391/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
20/9 = 20 × 20/9 × 20 = 400/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
1/20 = 1 × 9/20 × 9 = 9/180 - Subtract the two like fractions:
400/180 - 9/180 = 400 - 9/180 = 391/180 - In mixed form: 231/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9-1/20 20/9-2/20 20/18-1/20 20/9-1/40 60/9-1/20 20/9-3/20 20/27-1/20 20/9-1/60 20/9-5/20 20/45-1/20 20/9-7/20 20/63-1/20