Add 84/18 and 35/21
1st number: 4 12/18, 2nd number: 1 14/21
84/18 + 35/21 is 19/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
35/21 = 35 × 6/21 × 6 = 210/126 - Add the two like fractions:
588/126 + 210/126 = 588 + 210/126 = 798/126 - 798/126 simplified gives 19/3
- So, 84/18 + 35/21 = 19/3
In mixed form: 61/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+70/21 84/36+35/21 84/18+35/42 84/54+35/21 84/18+35/63 84/90+35/21