Subtract 45/40 from 18/24
1st number: 18/24, 2nd number: 1 5/40
18/24 - 45/40 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
18/24 = 18 × 5/24 × 5 = 90/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Subtract the two like fractions:
90/120 - 135/120 = 90 - 135/120 = -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: 36/24-45/40 18/24-90/40 18/48-45/40 18/24-45/80 54/24-45/40 18/72-45/40 90/24-45/40