Subtract 9/18 from 27/90
27/90 - 9/18 is -1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
27/90 = 27 × 1/90 × 1 = 27/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Subtract the two like fractions:
27/90 - 45/90 = 27 - 45/90 = -18/90 - After reducing the fraction, the answer is -1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90-9/18 27/90-9/36 81/90-9/18 27/90-27/18 27/90-9/54 27/90-45/18 27/90-9/90 27/90-63/18