Add 3/12 and 30/70
3/12 + 30/70 is 19/28.
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,
30/70 = 30 × 6/70 × 6 = 180/420 - Add the two like fractions:
105/420 + 180/420 = 105 + 180/420 = 285/420 - 285/420 simplified gives 19/28
- So, 3/12 + 30/70 = 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+30/70 3/12+60/70 3/24+30/70 9/12+30/70 3/12+90/70 3/36+30/70 15/12+30/70 3/60+30/70 21/12+30/70 3/84+30/70