Subtract 21/42 from 6/25
6/25 - 21/42 is -13/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
6/25 = 6 × 42/25 × 42 = 252/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
21/42 = 21 × 25/42 × 25 = 525/1050 - Subtract the two like fractions:
252/1050 - 525/1050 = 252 - 525/1050 = -273/1050 - After reducing the fraction, the answer is -13/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/25-21/42 6/50-21/42 6/25-21/84 18/25-21/42 6/25-63/42 6/75-21/42 30/25-21/42 42/25-21/42