A 10 ft. by 14 ft. wall containing two windows needs to be painted. Both windows measure 3 ft. by 5 ft. Find the percent of the wall that needs to be painted.

Question

anonymous · Answer

The way you solve this problem is to find the proportion of the wall that is covered by the two windows DIVIDED by the total area of the wall.

2 windows * area per window / area of wall

2*(3*5) / (10*14)

anonymous · Answer

I did that, but my teacher siad it wasnt right?

anonymous · Answer

Oh I am so sorry. I just told you how to find the proportion of the wall is WINDOWS NOT WALL. Lol. 

To find the proportion that is wall, you want to subtract the area of the two windows from the whole area of the wall, THEN divide that number by the area of the wall.

anonymous · Answer

OH! Thanks. That makes more sense, haha.