Subtract 15/30 from 42/75
42/75 - 15/30 is 3/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 30 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 30 × 5 = 150,
15/30 = 15 × 5/30 × 5 = 75/150 - Subtract the two like fractions:
84/150 - 75/150 = 84 - 75/150 = 9/150 - After reducing the fraction, the answer is 3/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75-15/30 42/75-15/60 42/75-45/30 42/75-15/90 42/75-75/30