Subtract 42/50 from 21/25
21/25 - 42/50 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 50 is 50
Next, find the equivalent fraction of both fractional numbers with denominator 50 - For the 1st fraction, since 25 × 2 = 50,
21/25 = 21 × 2/25 × 2 = 42/50 - Likewise, for the 2nd fraction, since 50 × 1 = 50,
42/50 = 42 × 1/50 × 1 = 42/50 - Subtract the two like fractions:
42/50 - 42/50 = 42 - 42/50 = 0/50 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-42/50 21/25-84/50 21/50-42/50 63/25-42/50 21/75-42/50