Subtract 42/27 from 15/25
1st number: 15/25, 2nd number: 1 15/27
15/25 - 42/27 is -43/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 27 is 675
Next, find the equivalent fraction of both fractional numbers with denominator 675 - For the 1st fraction, since 25 × 27 = 675,
15/25 = 15 × 27/25 × 27 = 405/675 - Likewise, for the 2nd fraction, since 27 × 25 = 675,
42/27 = 42 × 25/27 × 25 = 1050/675 - Subtract the two like fractions:
405/675 - 1050/675 = 405 - 1050/675 = -645/675 - After reducing the fraction, the answer is -43/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25-42/27 15/25-84/27 15/50-42/27 15/25-42/54 45/25-42/27 15/75-42/27 15/25-42/81 75/25-42/27