Subtract 21/27 from 84/28
1st number: 3 0/28, 2nd number: 21/27
84/28 - 21/27 is 20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
84/28 = 84 × 27/28 × 27 = 2268/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
21/27 = 21 × 28/27 × 28 = 588/756 - Subtract the two like fractions:
2268/756 - 588/756 = 2268 - 588/756 = 1680/756 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-42/27 84/56-21/27 84/28-21/54 84/28-63/27 84/28-21/81