Add 30/42 and 15/3
1st number: 30/42, 2nd number: 5 0/3
30/42 + 15/3 is 40/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
30/42 = 30 × 1/42 × 1 = 30/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
15/3 = 15 × 14/3 × 14 = 210/42 - Add the two like fractions:
30/42 + 210/42 = 30 + 210/42 = 240/42 - 240/42 simplified gives 40/7
- So, 30/42 + 15/3 = 40/7
In mixed form: 55/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+15/3 30/42+30/3 30/84+15/3 30/42+15/6 90/42+15/3 30/42+45/3 30/42+15/9 30/42+75/3 30/42+15/21