Subtract 6/90 from 15/18
15/18 - 6/90 is 23/30.
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,
15/18 = 15 × 5/18 × 5 = 75/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
6/90 = 6 × 1/90 × 1 = 6/90 - Subtract the two like fractions:
75/90 - 6/90 = 75 - 6/90 = 69/90 - After reducing the fraction, the answer is 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-6/90 15/18-12/90 15/36-6/90 45/18-6/90 15/18-18/90 15/54-6/90 75/18-6/90 15/18-30/90 15/90-6/90 15/18-42/90