Add 9/21 and 80/84
9/21 + 80/84 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
80/84 = 80 × 1/84 × 1 = 80/84 - Add the two like fractions:
36/84 + 80/84 = 36 + 80/84 = 116/84 - 116/84 simplified gives 29/21
- So, 9/21 + 80/84 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+80/84 9/42+80/84 27/21+80/84 9/63+80/84 45/21+80/84 63/21+80/84