Subtract 45/30 from 15/25
1st number: 15/25, 2nd number: 1 15/30
15/25 - 45/30 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 25 × 6 = 150,
15/25 = 15 × 6/25 × 6 = 90/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
45/30 = 45 × 5/30 × 5 = 225/150 - Subtract the two like fractions:
90/150 - 225/150 = 90 - 225/150 = -135/150 - After reducing the fraction, the answer is -9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25-45/30 15/25-90/30 15/50-45/30 15/25-45/60 45/25-45/30 15/75-45/30 15/25-45/90 75/25-45/30