Add 3/6 and 7/21
3/6 + 7/21 is 5/6.
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,
3/6 = 3 × 7/6 × 7 = 21/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
7/21 = 7 × 2/21 × 2 = 14/42 - Add the two like fractions:
21/42 + 14/42 = 21 + 14/42 = 35/42 - 35/42 simplified gives 5/6
- So, 3/6 + 7/21 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 3/6+14/21 3/12+7/21 3/6+7/42 9/6+7/21 3/18+7/21 3/6+7/63 15/6+7/21 3/6+35/21 3/30+7/21 21/6+7/21 3/6+49/21 3/42+7/21