Add 9/42 and 30/21
1st number: 9/42, 2nd number: 1 9/21
9/42 + 30/21 is 23/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
9/42 = 9 × 1/42 × 1 = 9/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
30/21 = 30 × 2/21 × 2 = 60/42 - Add the two like fractions:
9/42 + 60/42 = 9 + 60/42 = 69/42 - 69/42 simplified gives 23/14
- So, 9/42 + 30/21 = 23/14
In mixed form: 19/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+30/21 9/42+60/21 9/84+30/21 9/42+30/42 27/42+30/21 9/42+90/21 9/42+30/63 45/42+30/21 63/42+30/21