Add 20/70 and 56/21
1st number: 20/70, 2nd number: 2 14/21
20/70 + 56/21 is 62/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
56/21 = 56 × 10/21 × 10 = 560/210 - Add the two like fractions:
60/210 + 560/210 = 60 + 560/210 = 620/210 - 620/210 simplified gives 62/21
- So, 20/70 + 56/21 = 62/21
In mixed form: 220/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+56/21 20/70+56/42 60/70+56/21 20/70+56/63