Add 12/42 and 7/30
12/42 + 7/30 is 109/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 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 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Add the two like fractions:
60/210 + 49/210 = 60 + 49/210 = 109/210 - So, 12/42 + 7/30 = 109/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+7/30 12/42+14/30 12/84+7/30 12/42+7/60 36/42+7/30 12/42+21/30 12/42+7/90 60/42+7/30 12/42+35/30 84/42+7/30 12/42+49/30