Add 21/84 and 35/54
21/84 + 35/54 is 97/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
21/84 = 21 × 9/84 × 9 = 189/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
35/54 = 35 × 14/54 × 14 = 490/756 - Add the two like fractions:
189/756 + 490/756 = 189 + 490/756 = 679/756 - 679/756 simplified gives 97/108
- So, 21/84 + 35/54 = 97/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+35/54 21/84+70/54 63/84+35/54