Subtract 9/72 from 8/18
8/18 - 9/72 is 23/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
8/18 = 8 × 4/18 × 4 = 32/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
9/72 = 9 × 1/72 × 1 = 9/72 - Subtract the two like fractions:
32/72 - 9/72 = 32 - 9/72 = 23/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-9/72 8/18-18/72 8/36-9/72 24/18-9/72 8/18-27/72 8/54-9/72 40/18-9/72 8/18-45/72 8/90-9/72 56/18-9/72 8/18-63/72