Add 80/70 and 6/21
1st number: 1 10/70, 2nd number: 6/21
80/70 + 6/21 is 10/7.
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,
80/70 = 80 × 3/70 × 3 = 240/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Add the two like fractions:
240/210 + 60/210 = 240 + 60/210 = 300/210 - 300/210 simplified gives 10/7
- So, 80/70 + 6/21 = 10/7
In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+12/21 80/70+6/42 80/70+18/21 80/70+6/63 80/70+30/21 80/70+42/21