Subtract 21/9 from 25/45
1st number: 25/45, 2nd number: 2 3/9
25/45 - 21/9 is -16/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
25/45 = 25 × 1/45 × 1 = 25/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Subtract the two like fractions:
25/45 - 105/45 = 25 - 105/45 = -80/45 - After reducing the fraction, the answer is -16/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45-21/9 25/45-42/9 25/90-21/9 25/45-21/18 75/45-21/9 25/45-63/9 25/45-21/27 25/45-21/45 25/45-21/63