Subtract 6/45 from 21/9
1st number: 2 3/9, 2nd number: 6/45
21/9 - 6/45 is 11/5.
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,
21/9 = 21 × 5/9 × 5 = 105/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
6/45 = 6 × 1/45 × 1 = 6/45 - Subtract the two like fractions:
105/45 - 6/45 = 105 - 6/45 = 99/45 - After reducing the fraction, the answer is 11/5
- In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-6/45 21/9-12/45 21/18-6/45 21/9-6/90 63/9-6/45 21/9-18/45 21/27-6/45 21/9-30/45 21/45-6/45 21/9-42/45 21/63-6/45