Add 20/3 and 81/70
1st number: 6 2/3, 2nd number: 1 11/70
20/3 + 81/70 is 1643/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 3 × 70 = 210,
20/3 = 20 × 70/3 × 70 = 1400/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
81/70 = 81 × 3/70 × 3 = 243/210 - Add the two like fractions:
1400/210 + 243/210 = 1400 + 243/210 = 1643/210 - So, 20/3 + 81/70 = 1643/210
In mixed form: 7173/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/3+81/70 20/6+81/70 60/3+81/70 20/9+81/70 20/15+81/70 20/21+81/70