Add 9/42 and 9/15
9/42 + 9/15 is 57/70.
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,
9/15 = 9 × 14/15 × 14 = 126/210 - Add the two like fractions:
45/210 + 126/210 = 45 + 126/210 = 171/210 - 171/210 simplified gives 57/70
- So, 9/42 + 9/15 = 57/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+9/15 9/42+18/15 9/84+9/15 9/42+9/30 27/42+9/15 9/42+27/15 9/42+9/45 45/42+9/15 9/42+45/15 9/42+9/75 63/42+9/15 9/42+63/15