Subtract 3/21 from 28/14
1st number: 2 0/14, 2nd number: 3/21
28/14 - 3/21 is 13/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
28/14 = 28 × 3/14 × 3 = 84/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Subtract the two like fractions:
84/42 - 6/42 = 84 - 6/42 = 78/42 - After reducing the fraction, the answer is 13/7
- In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/14-3/21 28/14-6/21 28/14-3/42 84/14-3/21 28/14-9/21 28/42-3/21 28/14-3/63 28/14-15/21 28/70-3/21 28/98-3/21