Subtract 9/18 from 20/25
20/25 - 9/18 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
20/25 = 20 × 18/25 × 18 = 360/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
9/18 = 9 × 25/18 × 25 = 225/450 - Subtract the two like fractions:
360/450 - 225/450 = 360 - 225/450 = 135/450 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-9/18 20/50-9/18 20/25-9/36 60/25-9/18 20/25-27/18 20/75-9/18 20/25-9/54 20/25-45/18 20/25-9/90 20/25-63/18