Add 20/70 and 9/7
1st number: 20/70, 2nd number: 1 2/7
20/70 + 9/7 is 11/7.
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,
9/7 = 9 × 10/7 × 10 = 90/70 - Add the two like fractions:
20/70 + 90/70 = 20 + 90/70 = 110/70 - 110/70 simplified gives 11/7
- So, 20/70 + 9/7 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+9/7 20/70+18/7 20/70+9/14 60/70+9/7 20/70+27/7 20/70+9/21 20/70+45/7 20/70+9/35 20/70+63/7 20/70+9/49