PLZ HELP A total of 800 advertisements were sold for a certain magazine. If 80 percent of the first 150 sold in color, 40 percent of the next 400 sold in color, and 80 percent of the next 80 were sold in color, what percent of the 800 magazines were sold in color?

43 percent

Explanation:
First you have to find how many of each group were sold. To do this you multiply the number given(150, 400, or 80) by the percent as a decimal.

So for the first 150 you multiply 150 by .80
150*.8=120

The next 400 would be 400*.4=160

The next 80 would be 80*.8=64

Now you add up the totals found.
120+160+64=344

Finally divide this number by the total 800 and multiply the decimal by 100 to convert it to percent.
344/800=.43
.43*100=43

43 percent