Add 21/70 and 20/7
1st number: 21/70, 2nd number: 2 6/7
21/70 + 20/7 is 221/70.
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,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
20/7 = 20 × 10/7 × 10 = 200/70 - Add the two like fractions:
21/70 + 200/70 = 21 + 200/70 = 221/70 - So, 21/70 + 20/7 = 221/70
In mixed form: 311/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+20/7 21/70+40/7 21/70+20/14 63/70+20/7 21/70+60/7 21/70+20/21 21/70+20/35 21/70+20/49