Subtract 9/90 from 12/25
12/25 - 9/90 is 19/50.
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,
12/25 = 12 × 18/25 × 18 = 216/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
9/90 = 9 × 5/90 × 5 = 45/450 - Subtract the two like fractions:
216/450 - 45/450 = 216 - 45/450 = 171/450 - After reducing the fraction, the answer is 19/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/25-9/90 12/25-18/90 12/50-9/90 36/25-9/90 12/25-27/90 12/75-9/90 60/25-9/90 12/25-45/90 84/25-9/90 12/25-63/90