Subtract 8/18 from 40/15
1st number: 2 10/15, 2nd number: 8/18
40/15 - 8/18 is 20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
40/15 = 40 × 6/15 × 6 = 240/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Subtract the two like fractions:
240/90 - 40/90 = 240 - 40/90 = 200/90 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15-8/18 40/15-16/18 40/30-8/18 40/15-8/36 40/15-24/18 40/45-8/18 40/15-8/54 40/15-40/18 40/75-8/18 40/15-8/90 40/15-56/18