Add 30/42 and 9/28
30/42 + 9/28 is 29/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
30/42 = 30 × 2/42 × 2 = 60/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
9/28 = 9 × 3/28 × 3 = 27/84 - Add the two like fractions:
60/84 + 27/84 = 60 + 27/84 = 87/84 - 87/84 simplified gives 29/28
- So, 30/42 + 9/28 = 29/28
In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+9/28 30/42+18/28 30/84+9/28 30/42+9/56 90/42+9/28 30/42+27/28 30/42+9/84 30/42+45/28 30/42+63/28