Add 9/42 and 30/15
1st number: 9/42, 2nd number: 2 0/15
9/42 + 30/15 is 31/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
9/42 = 9 × 5/42 × 5 = 45/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
30/15 = 30 × 14/15 × 14 = 420/210 - Add the two like fractions:
45/210 + 420/210 = 45 + 420/210 = 465/210 - 465/210 simplified gives 31/14
- So, 9/42 + 30/15 = 31/14
In mixed form: 23/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+30/15 9/42+60/15 9/84+30/15 27/42+30/15 9/42+90/15 9/42+30/45 45/42+30/15 9/42+30/75 63/42+30/15