Add 30/21 and 15/6
1st number: 1 9/21, 2nd number: 2 3/6
30/21 + 15/6 is 55/14.
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,
30/21 = 30 × 2/21 × 2 = 60/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Add the two like fractions:
60/42 + 105/42 = 60 + 105/42 = 165/42 - 165/42 simplified gives 55/14
- So, 30/21 + 15/6 = 55/14
In mixed form: 313/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+15/6 30/21+30/6 30/42+15/6 30/21+15/12 90/21+15/6 30/21+45/6 30/63+15/6 30/21+15/18 30/21+75/6 30/21+15/30 30/21+15/42