Subtract 28/21 from 12/2
1st number: 6 0/2, 2nd number: 1 7/21
12/2 - 28/21 is 14/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
12/2 = 12 × 21/2 × 21 = 252/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Subtract the two like fractions:
252/42 - 56/42 = 252 - 56/42 = 196/42 - After reducing the fraction, the answer is 14/3
- In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/2-28/21 12/2-56/21 12/4-28/21 12/2-28/42 36/2-28/21 12/2-84/21 12/6-28/21 12/2-28/63 60/2-28/21 12/10-28/21 84/2-28/21 12/14-28/21