Add 70/12 and 28/20
1st number: 5 10/12, 2nd number: 1 8/20
70/12 + 28/20 is 217/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
70/12 = 70 × 5/12 × 5 = 350/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Add the two like fractions:
350/60 + 84/60 = 350 + 84/60 = 434/60 - 434/60 simplified gives 217/30
- So, 70/12 + 28/20 = 217/30
In mixed form: 77/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/12+56/20 70/24+28/20 70/12+28/40 70/12+84/20 70/36+28/20 70/12+28/60 70/60+28/20 70/84+28/20