Subtract 5/18 from 21/36
21/36 - 5/18 is 11/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
5/18 = 5 × 2/18 × 2 = 10/36 - Subtract the two like fractions:
21/36 - 10/36 = 21 - 10/36 = 11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36-5/18 21/36-10/18 21/72-5/18 21/36-5/36 63/36-5/18 21/36-15/18 21/36-5/54 21/36-25/18 21/36-5/90 21/36-35/18