Subtract 40/18 from 15/5
1st number: 3 0/5, 2nd number: 2 4/18
15/5 - 40/18 is 7/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
15/5 = 15 × 18/5 × 18 = 270/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
40/18 = 40 × 5/18 × 5 = 200/90 - Subtract the two like fractions:
270/90 - 200/90 = 270 - 200/90 = 70/90 - After reducing the fraction, the answer is 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-40/18 15/5-80/18 15/10-40/18 15/5-40/36 45/5-40/18 15/5-40/54 75/5-40/18 15/25-40/18 15/5-40/90 15/35-40/18