Subtract 25/50 from 3/21
3/21 - 25/50 is -5/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
3/21 = 3 × 50/21 × 50 = 150/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
25/50 = 25 × 21/50 × 21 = 525/1050 - Subtract the two like fractions:
150/1050 - 525/1050 = 150 - 525/1050 = -375/1050 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21-25/50 3/42-25/50 9/21-25/50 3/21-75/50 3/63-25/50 15/21-25/50