Subtract 21/20 from 50/9
1st number: 5 5/9, 2nd number: 1 1/20
50/9 - 21/20 is 811/180.
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,
50/9 = 50 × 20/9 × 20 = 1000/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Subtract the two like fractions:
1000/180 - 189/180 = 1000 - 189/180 = 811/180 - In mixed form: 491/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/9-42/20 50/18-21/20 50/9-21/40 50/9-63/20 50/27-21/20 50/9-21/60 50/45-21/20 50/63-21/20