Subtract 4/21 from 28/3
1st number: 9 1/3, 2nd number: 4/21
28/3 - 4/21 is 64/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
28/3 = 28 × 7/3 × 7 = 196/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
4/21 = 4 × 1/21 × 1 = 4/21 - Subtract the two like fractions:
196/21 - 4/21 = 196 - 4/21 = 192/21 - After reducing the fraction, the answer is 64/7
- In mixed form: 91/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-4/21 28/3-8/21 28/6-4/21 28/3-4/42 84/3-4/21 28/3-12/21 28/9-4/21 28/3-4/63 28/3-20/21 28/15-4/21 28/3-28/21 28/21-4/21