Subtract 20/18 from 9/25
1st number: 9/25, 2nd number: 1 2/18
9/25 - 20/18 is -169/225.
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,
9/25 = 9 × 18/25 × 18 = 162/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
20/18 = 20 × 25/18 × 25 = 500/450 - Subtract the two like fractions:
162/450 - 500/450 = 162 - 500/450 = -338/450 - After reducing the fraction, the answer is -169/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/25-20/18 9/25-40/18 9/50-20/18 9/25-20/36 27/25-20/18 9/25-60/18 9/75-20/18 9/25-20/54 45/25-20/18 9/25-20/90 63/25-20/18