Add 2/21 and 80/30, Solve 2/21 + 2 20/30 as a fraction

Add 2/21 and 80/30

1^st number: 2/21, 2^nd number: 2 20/30

2/21 + 80/30 is 58/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 21 × 10 = 210,
2/21 = 2 × 10/21 × 10 = 20/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
80/30 = 80 × 7/30 × 7 = 560/210
Add the two like fractions:
20/210 + 560/210 = 20 + 560/210 = 580/210
580/210 simplified gives 58/21
So, 2/21 + 80/30 = 58/21
In mixed form: 216/21

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad