Subtract 15/90 from 45/25
1st number: 1 20/25, 2nd number: 15/90
45/25 - 15/90 is 49/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
45/25 = 45 × 18/25 × 18 = 810/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
15/90 = 15 × 5/90 × 5 = 75/450 - Subtract the two like fractions:
810/450 - 75/450 = 810 - 75/450 = 735/450 - After reducing the fraction, the answer is 49/30
- In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25-15/90 45/25-30/90 45/50-15/90 45/25-45/90 45/75-15/90 45/25-75/90