Subtract 28/35 from 21/9
1st number: 2 3/9, 2nd number: 28/35
21/9 - 28/35 is 23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 9 × 35 = 315,
21/9 = 21 × 35/9 × 35 = 735/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
28/35 = 28 × 9/35 × 9 = 252/315 - Subtract the two like fractions:
735/315 - 252/315 = 735 - 252/315 = 483/315 - After reducing the fraction, the answer is 23/15
- In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-28/35 21/9-56/35 21/18-28/35 21/9-28/70 63/9-28/35 21/9-84/35 21/27-28/35 21/45-28/35 21/63-28/35