Subtract 21/9 from 45/6
1st number: 7 3/6, 2nd number: 2 3/9
45/6 - 21/9 is 31/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 6 × 3 = 18,
45/6 = 45 × 3/6 × 3 = 135/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Subtract the two like fractions:
135/18 - 42/18 = 135 - 42/18 = 93/18 - After reducing the fraction, the answer is 31/6
- In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-21/9 45/6-42/9 45/12-21/9 45/6-21/18 45/6-63/9 45/18-21/9 45/6-21/27 45/30-21/9 45/6-21/45 45/42-21/9 45/6-21/63