Subtract 21/8 from 50/9
1st number: 5 5/9, 2nd number: 2 5/8
50/9 - 21/8 is 211/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
50/9 = 50 × 8/9 × 8 = 400/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Subtract the two like fractions:
400/72 - 189/72 = 400 - 189/72 = 211/72 - In mixed form: 267/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/9-42/8 50/18-21/8 50/9-21/16 50/9-63/8 50/27-21/8 50/9-21/24 50/45-21/8 50/9-21/40 50/63-21/8 50/9-21/56