Add 6/9 and 20/42
6/9 + 20/42 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
6/9 = 6 × 14/9 × 14 = 84/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Add the two like fractions:
84/126 + 60/126 = 84 + 60/126 = 144/126 - 144/126 simplified gives 8/7
- So, 6/9 + 20/42 = 8/7
In mixed form: 11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/9+20/42 6/9+40/42 6/18+20/42 6/9+20/84 18/9+20/42 6/9+60/42 6/27+20/42 30/9+20/42 6/45+20/42 42/9+20/42 6/63+20/42