Subtract 2/4 from 21/9
1st number: 2 3/9, 2nd number: 2/4
21/9 - 2/4 is 11/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
21/9 = 21 × 4/9 × 4 = 84/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
2/4 = 2 × 9/4 × 9 = 18/36 - Subtract the two like fractions:
84/36 - 18/36 = 84 - 18/36 = 66/36 - After reducing the fraction, the answer is 11/6
- In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-2/4 21/18-2/4 21/9-2/8 63/9-2/4 21/9-6/4 21/27-2/4 21/9-2/12 21/9-10/4 21/45-2/4 21/9-2/20 21/9-14/4 21/63-2/4 21/9-2/28