Subtract 21/25 from 18/9
1st number: 2 0/9, 2nd number: 21/25
18/9 - 21/25 is 29/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 25 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 9 × 25 = 225,
18/9 = 18 × 25/9 × 25 = 450/225 - Likewise, for the 2nd fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225 - Subtract the two like fractions:
450/225 - 189/225 = 450 - 189/225 = 261/225 - After reducing the fraction, the answer is 29/25
- In mixed form: 14/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9-21/25 18/9-42/25 18/9-21/50 54/9-21/25 18/9-63/25 18/27-21/25 18/9-21/75 90/9-21/25 18/45-21/25 18/63-21/25