Add 12/42 and 7/70
12/42 + 7/70 is 27/70.
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,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210 - Add the two like fractions:
60/210 + 21/210 = 60 + 21/210 = 81/210 - 81/210 simplified gives 27/70
- So, 12/42 + 7/70 = 27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+7/70 12/42+14/70 12/84+7/70 36/42+7/70 12/42+21/70 60/42+7/70 12/42+35/70 84/42+7/70 12/42+49/70