Subtract 21/25 from 45/12
1st number: 3 9/12, 2nd number: 21/25
45/12 - 21/25 is 291/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
45/12 = 45 × 25/12 × 25 = 1125/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
21/25 = 21 × 12/25 × 12 = 252/300 - Subtract the two like fractions:
1125/300 - 252/300 = 1125 - 252/300 = 873/300 - After reducing the fraction, the answer is 291/100
- In mixed form: 291/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-21/25 45/12-42/25 45/24-21/25 45/12-21/50 45/12-63/25 45/36-21/25 45/12-21/75 45/60-21/25 45/84-21/25