Subtract 4/72 from 12/18
12/18 - 4/72 is 11/18.
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,
12/18 = 12 × 4/18 × 4 = 48/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
4/72 = 4 × 1/72 × 1 = 4/72 - Subtract the two like fractions:
48/72 - 4/72 = 48 - 4/72 = 44/72 - After reducing the fraction, the answer is 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18-4/72 12/18-8/72 12/36-4/72 36/18-4/72 12/18-12/72 12/54-4/72 60/18-4/72 12/18-20/72 12/90-4/72 84/18-4/72 12/18-28/72