Subtract 18/24 from 15/40
15/40 - 18/24 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
15/40 = 15 × 3/40 × 3 = 45/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
18/24 = 18 × 5/24 × 5 = 90/120 - Subtract the two like fractions:
45/120 - 90/120 = 45 - 90/120 = -45/120 - After reducing the fraction, the answer is -3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-18/24 15/40-36/24 15/80-18/24 15/40-18/48 45/40-18/24 15/40-54/24 15/40-18/72 75/40-18/24 15/40-90/24