Subtract 40/72 from 18/3
1st number: 6 0/3, 2nd number: 40/72
18/3 - 40/72 is 49/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 3 × 24 = 72,
18/3 = 18 × 24/3 × 24 = 432/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
40/72 = 40 × 1/72 × 1 = 40/72 - Subtract the two like fractions:
432/72 - 40/72 = 432 - 40/72 = 392/72 - After reducing the fraction, the answer is 49/9
- In mixed form: 54/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/3-40/72 18/3-80/72 18/6-40/72 54/3-40/72 18/9-40/72 90/3-40/72 18/15-40/72 18/21-40/72