Add 7/42 and 9/70
7/42 + 9/70 is 31/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
9/70 = 9 × 3/70 × 3 = 27/210 - Add the two like fractions:
35/210 + 27/210 = 35 + 27/210 = 62/210 - 62/210 simplified gives 31/105
- So, 7/42 + 9/70 = 31/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+9/70 7/42+18/70 7/84+9/70 21/42+9/70 7/42+27/70 35/42+9/70 7/42+45/70 49/42+9/70 7/42+63/70