Add 80/21 and 7/84
1st number: 3 17/21, 2nd number: 7/84
80/21 + 7/84 is 109/28.
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,
80/21 = 80 × 4/21 × 4 = 320/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Add the two like fractions:
320/84 + 7/84 = 320 + 7/84 = 327/84 - 327/84 simplified gives 109/28
- So, 80/21 + 7/84 = 109/28
In mixed form: 325/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+14/84 80/42+7/84 80/21+21/84 80/63+7/84 80/21+35/84 80/21+49/84