Subtract 5/18 from 30/72
30/72 - 5/18 is 5/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
5/18 = 5 × 4/18 × 4 = 20/72 - Subtract the two like fractions:
30/72 - 20/72 = 30 - 20/72 = 10/72 - After reducing the fraction, the answer is 5/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-5/18 30/72-10/18 30/72-5/36 90/72-5/18 30/72-15/18 30/72-5/54 30/72-25/18 30/72-5/90 30/72-35/18