Subtract 8/45 from 20/9
1st number: 2 2/9, 2nd number: 8/45
20/9 - 8/45 is 92/45.
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,
20/9 = 20 × 5/9 × 5 = 100/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
8/45 = 8 × 1/45 × 1 = 8/45 - Subtract the two like fractions:
100/45 - 8/45 = 100 - 8/45 = 92/45 - In mixed form: 22/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9-8/45 20/9-16/45 20/18-8/45 20/9-8/90 60/9-8/45 20/9-24/45 20/27-8/45 20/9-40/45 20/45-8/45 20/9-56/45 20/63-8/45