Add 20/6 and 8/21
1st number: 3 2/6, 2nd number: 8/21
20/6 + 8/21 is 26/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Add the two like fractions:
140/42 + 16/42 = 140 + 16/42 = 156/42 - 156/42 simplified gives 26/7
- So, 20/6 + 8/21 = 26/7
In mixed form: 35/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6+8/21 20/6+16/21 20/12+8/21 20/6+8/42 60/6+8/21 20/6+24/21 20/18+8/21 20/6+8/63 20/6+40/21 20/30+8/21 20/6+56/21 20/42+8/21