Add 18/21 and 30/6
1st number: 18/21, 2nd number: 5 0/6
18/21 + 30/6 is 41/7.
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,
18/21 = 18 × 2/21 × 2 = 36/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
30/6 = 30 × 7/6 × 7 = 210/42 - Add the two like fractions:
36/42 + 210/42 = 36 + 210/42 = 246/42 - 246/42 simplified gives 41/7
- So, 18/21 + 30/6 = 41/7
In mixed form: 56/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+30/6 18/21+60/6 18/42+30/6 18/21+30/12 54/21+30/6 18/21+90/6 18/63+30/6 18/21+30/18 90/21+30/6 18/21+30/42