Subtract 18/40 from 15/75
15/75 - 18/40 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
15/75 = 15 × 8/75 × 8 = 120/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
18/40 = 18 × 15/40 × 15 = 270/600 - Subtract the two like fractions:
120/600 - 270/600 = 120 - 270/600 = -150/600 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75-18/40 15/75-36/40 15/75-18/80 45/75-18/40 15/75-54/40 15/75-90/40