Add 30/28 and 9/42
1st number: 1 2/28, 2nd number: 9/42
30/28 + 9/42 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Add the two like fractions:
90/84 + 18/84 = 90 + 18/84 = 108/84 - 108/84 simplified gives 9/7
- So, 30/28 + 9/42 = 9/7
In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28+9/42 30/28+18/42 30/56+9/42 30/28+9/84 90/28+9/42 30/28+27/42 30/84+9/42 30/28+45/42 30/28+63/42