Subtract 15/25 from 42/12
1st number: 3 6/12, 2nd number: 15/25
42/12 - 15/25 is 29/10.
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,
42/12 = 42 × 25/12 × 25 = 1050/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
15/25 = 15 × 12/25 × 12 = 180/300 - Subtract the two like fractions:
1050/300 - 180/300 = 1050 - 180/300 = 870/300 - After reducing the fraction, the answer is 29/10
- In mixed form: 29/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-15/25 42/12-30/25 42/24-15/25 42/12-15/50 42/12-45/25 42/36-15/25 42/12-15/75 42/12-75/25 42/60-15/25 42/84-15/25