Subtract 9/20 from 40/9
1st number: 4 4/9, 2nd number: 9/20
40/9 - 9/20 is 719/180.
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,
40/9 = 40 × 20/9 × 20 = 800/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
9/20 = 9 × 9/20 × 9 = 81/180 - Subtract the two like fractions:
800/180 - 81/180 = 800 - 81/180 = 719/180 - In mixed form: 3179/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9-9/20 40/9-18/20 40/18-9/20 40/9-9/40 40/9-27/20 40/27-9/20 40/9-9/60 40/9-45/20 40/45-9/20 40/9-63/20 40/63-9/20