Subtract 18/50 from 42/75
42/75 - 18/50 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 50 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
42/75 = 42 × 2/75 × 2 = 84/150 - Likewise, for the 2nd fraction, since 50 × 3 = 150,
18/50 = 18 × 3/50 × 3 = 54/150 - Subtract the two like fractions:
84/150 - 54/150 = 84 - 54/150 = 30/150 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75-18/50 42/75-36/50 42/75-54/50 42/75-90/50