Subtract 21/40 from 20/3
1st number: 6 2/3, 2nd number: 21/40
20/3 - 21/40 is 737/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
20/3 = 20 × 40/3 × 40 = 800/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Subtract the two like fractions:
800/120 - 63/120 = 800 - 63/120 = 737/120 - In mixed form: 617/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/3-21/40 20/3-42/40 20/6-21/40 20/3-21/80 60/3-21/40 20/3-63/40 20/9-21/40 20/15-21/40 20/21-21/40