Subtract 6/9 from 18/72
18/72 - 6/9 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
6/9 = 6 × 8/9 × 8 = 48/72 - Subtract the two like fractions:
18/72 - 48/72 = 18 - 48/72 = -30/72 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72-6/9 18/72-12/9 18/72-6/18 54/72-6/9 18/72-18/9 18/72-6/27 90/72-6/9 18/72-30/9 18/72-6/45 18/72-42/9 18/72-6/63