Subtract 40/18 from 15/24
1st number: 15/24, 2nd number: 2 4/18
15/24 - 40/18 is -115/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
15/24 = 15 × 3/24 × 3 = 45/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
40/18 = 40 × 4/18 × 4 = 160/72 - Subtract the two like fractions:
45/72 - 160/72 = 45 - 160/72 = -115/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/24-40/18 15/24-80/18 15/48-40/18 15/24-40/36 45/24-40/18 15/72-40/18 15/24-40/54 75/24-40/18 15/24-40/90