Add 80/12 and 2/7, Solve 6 8/12 + 2/7 as a fraction

Add 80/12 and 2/7

1^st number: 6 8/12, 2^nd number: 2/7

80/12 + 2/7 is 146/21.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
80/12 = 80 × 7/12 × 7 = 560/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
2/7 = 2 × 12/7 × 12 = 24/84
Add the two like fractions:
560/84 + 24/84 = 560 + 24/84 = 584/84
584/84 simplified gives 146/21
So, 80/12 + 2/7 = 146/21
In mixed form: 620/21

MathStep (Works offline)

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