Subtract 21/84 from 28/3
1st number: 9 1/3, 2nd number: 21/84
28/3 - 21/84 is 109/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
28/3 = 28 × 28/3 × 28 = 784/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Subtract the two like fractions:
784/84 - 21/84 = 784 - 21/84 = 763/84 - After reducing the fraction, the answer is 109/12
- In mixed form: 91/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-21/84 28/3-42/84 28/6-21/84 84/3-21/84 28/3-63/84 28/9-21/84 28/15-21/84 28/21-21/84