Subtract 21/45 from 40/9
1st number: 4 4/9, 2nd number: 21/45
40/9 - 21/45 is 179/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
40/9 = 40 × 5/9 × 5 = 200/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Subtract the two like fractions:
200/45 - 21/45 = 200 - 21/45 = 179/45 - In mixed form: 344/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9-21/45 40/9-42/45 40/18-21/45 40/9-21/90 40/9-63/45 40/27-21/45 40/45-21/45 40/63-21/45