Add 20/21 and 70/7
1st number: 20/21, 2nd number: 10 0/7
20/21 + 70/7 is 230/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
20/21 = 20 × 1/21 × 1 = 20/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
70/7 = 70 × 3/7 × 3 = 210/21 - Add the two like fractions:
20/21 + 210/21 = 20 + 210/21 = 230/21 - So, 20/21 + 70/7 = 230/21
In mixed form: 1020/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+70/7 20/42+70/7 20/21+70/14 60/21+70/7 20/63+70/7 20/21+70/21 20/21+70/35 20/21+70/49