Add 20/70 and 28/7
1st number: 20/70, 2nd number: 4 0/7
20/70 + 28/7 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
20/70 = 20 × 1/70 × 1 = 20/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
28/7 = 28 × 10/7 × 10 = 280/70 - Add the two like fractions:
20/70 + 280/70 = 20 + 280/70 = 300/70 - 300/70 simplified gives 30/7
- So, 20/70 + 28/7 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+28/7 20/70+56/7 20/70+28/14 60/70+28/7 20/70+84/7 20/70+28/21 20/70+28/35 20/70+28/49