Subtract 75/90 from 28/50
28/50 - 75/90 is -41/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
28/50 = 28 × 9/50 × 9 = 252/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
75/90 = 75 × 5/90 × 5 = 375/450 - Subtract the two like fractions:
252/450 - 375/450 = 252 - 375/450 = -123/450 - After reducing the fraction, the answer is -41/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/50-75/90 84/50-75/90