Add 7/21 and 18/6
1st number: 7/21, 2nd number: 3 0/6
7/21 + 18/6 is 10/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
7/21 = 7 × 2/21 × 2 = 14/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
18/6 = 18 × 7/6 × 7 = 126/42 - Add the two like fractions:
14/42 + 126/42 = 14 + 126/42 = 140/42 - 140/42 simplified gives 10/3
- So, 7/21 + 18/6 = 10/3
In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+18/6 7/21+36/6 7/42+18/6 7/21+18/12 7/21+54/6 7/63+18/6 35/21+18/6 7/21+90/6 7/21+18/30 49/21+18/6 7/21+18/42