Subtract 4/72 from 40/18
1st number: 2 4/18, 2nd number: 4/72
40/18 - 4/72 is 13/6.
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,
40/18 = 40 × 4/18 × 4 = 160/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
4/72 = 4 × 1/72 × 1 = 4/72 - Subtract the two like fractions:
160/72 - 4/72 = 160 - 4/72 = 156/72 - After reducing the fraction, the answer is 13/6
- In mixed form: 21/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-4/72 40/18-8/72 40/36-4/72 40/18-12/72 40/54-4/72 40/18-20/72 40/90-4/72 40/18-28/72