Subtract 5/18 from 30/80
30/80 - 5/18 is 7/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
5/18 = 5 × 40/18 × 40 = 200/720 - Subtract the two like fractions:
270/720 - 200/720 = 270 - 200/720 = 70/720 - After reducing the fraction, the answer is 7/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80-5/18 30/80-10/18 30/80-5/36 90/80-5/18 30/80-15/18 30/80-5/54 30/80-25/18 30/80-5/90 30/80-35/18