Subtract 21/54 from 84/28
1st number: 3 0/28, 2nd number: 21/54
84/28 - 21/54 is 47/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 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 54 × 14 = 756,
21/54 = 21 × 14/54 × 14 = 294/756 - Subtract the two like fractions:
2268/756 - 294/756 = 2268 - 294/756 = 1974/756 - After reducing the fraction, the answer is 47/18
- In mixed form: 211/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-42/54 84/56-21/54 84/28-63/54