Subtract 28/50 from 12/21
12/21 - 28/50 is 2/175.
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,
12/21 = 12 × 50/21 × 50 = 600/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
28/50 = 28 × 21/50 × 21 = 588/1050 - Subtract the two like fractions:
600/1050 - 588/1050 = 600 - 588/1050 = 12/1050 - After reducing the fraction, the answer is 2/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-28/50 12/21-56/50 12/42-28/50 36/21-28/50 12/21-84/50 12/63-28/50 60/21-28/50 84/21-28/50