After mixing 1 g of 60% ee (+)-Kendomycin with 2 g of 80% ee (+)-Kendomycin, what

is the ee of the final mixture?

I know the answer is 73% ee, but I don't understand how to get to that answer!

you put in .6g+1.6g ee, and you have a total mass of 3g

percent=2.2/3 * 100=73percent