Subtract 21/75 from 42/50
42/50 - 21/75 is 14/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 75 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 50 × 3 = 150,
42/50 = 42 × 3/50 × 3 = 126/150 - Likewise, for the 2nd fraction, since 75 × 2 = 150,
21/75 = 21 × 2/75 × 2 = 42/150 - Subtract the two like fractions:
126/150 - 42/150 = 126 - 42/150 = 84/150 - After reducing the fraction, the answer is 14/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-21/75 42/50-42/75 42/50-63/75