Subtract 8/90 from 27/18
1st number: 1 9/18, 2nd number: 8/90
27/18 - 8/90 is 127/90.
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,
27/18 = 27 × 5/18 × 5 = 135/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Subtract the two like fractions:
135/90 - 8/90 = 135 - 8/90 = 127/90 - In mixed form: 137/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-8/90 27/18-16/90 27/36-8/90 81/18-8/90 27/18-24/90 27/54-8/90 27/18-40/90 27/90-8/90 27/18-56/90