Subtract 50/90 from 3/18
3/18 - 50/90 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
3/18 = 3 × 5/18 × 5 = 15/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
50/90 = 50 × 1/90 × 1 = 50/90 - Subtract the two like fractions:
15/90 - 50/90 = 15 - 50/90 = -35/90 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-50/90 3/36-50/90 9/18-50/90 3/54-50/90 15/18-50/90 3/90-50/90 21/18-50/90