Subtract 21/9 from 45/5
1st number: 9 0/5, 2nd number: 2 3/9
45/5 - 21/9 is 20/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
45/5 = 45 × 9/5 × 9 = 405/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Subtract the two like fractions:
405/45 - 105/45 = 405 - 105/45 = 300/45 - After reducing the fraction, the answer is 20/3
- In mixed form: 62/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-21/9 45/5-42/9 45/10-21/9 45/5-21/18 45/5-63/9 45/15-21/9 45/5-21/27 45/25-21/9 45/5-21/45 45/35-21/9 45/5-21/63