Subtract 15/50 from 3/90
3/90 - 15/50 is -4/15.
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,
3/90 = 3 × 5/90 × 5 = 15/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
15/50 = 15 × 9/50 × 9 = 135/450 - Subtract the two like fractions:
15/450 - 135/450 = 15 - 135/450 = -120/450 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90-15/50 3/90-30/50 9/90-15/50 3/90-45/50 15/90-15/50 3/90-75/50 21/90-15/50