Subtract 9/50 from 9/90
9/90 - 9/50 is -2/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
9/90 = 9 × 5/90 × 5 = 45/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
9/50 = 9 × 9/50 × 9 = 81/450 - Subtract the two like fractions:
45/450 - 81/450 = 45 - 81/450 = -36/450 - After reducing the fraction, the answer is -2/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-9/50 9/90-18/50 27/90-9/50 9/90-27/50 45/90-9/50 9/90-45/50 63/90-9/50 9/90-63/50