Add 3/12 and 7/70
3/12 + 7/70 is 7/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
3/12 = 3 × 35/12 × 35 = 105/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
7/70 = 7 × 6/70 × 6 = 42/420 - Add the two like fractions:
105/420 + 42/420 = 105 + 42/420 = 147/420 - 147/420 simplified gives 7/20
- So, 3/12 + 7/70 = 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+7/70 3/12+14/70 3/24+7/70 9/12+7/70 3/12+21/70 3/36+7/70 15/12+7/70 3/12+35/70 3/60+7/70 21/12+7/70 3/12+49/70 3/84+7/70