Add 6/18 and 7/21
6/18 + 7/21 is 2/3.
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,
6/18 = 6 × 7/18 × 7 = 42/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
7/21 = 7 × 6/21 × 6 = 42/126 - Add the two like fractions:
42/126 + 42/126 = 42 + 42/126 = 84/126 - 84/126 simplified gives 2/3
- So, 6/18 + 7/21 = 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/18+7/21 6/18+14/21 6/36+7/21 6/18+7/42 6/54+7/21 6/18+7/63 30/18+7/21 6/18+35/21 6/90+7/21 42/18+7/21 6/18+49/21