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Question 884641: In reviewing the answer posted below to a question on the site I get very confused when it gets to the part about representing a percentage. Where does the fraction =22%2F30 come from?
I thought this would help me figure out how to calculate a percentage. My sample question is: I have a goal to sell 50 cars but I only sell 32, how do I calculate what percentage I did sell and what percentage I am short of my goal?
We have 120 students, with 32 receiving an A.
How many students did NOT receive an A?
120-32=88
Thus, 88 students did not receive an A.
Then all we need to do is represent 88 as a percentage of the 120 total students:
88%2F120
=22%2F30=11%2F15
The fraction of the class that did not receive an A is then 11/15.
We should also notice then that the fraction of the class who DID receive an A:
32%2F120=8%2F30=4%2F15
And of course 4/15 plus 11/15 is 15/15, or 1, which is the same as 100%.
Answer by rothauserc(4718)   (Show Source):
You can put this solution on YOUR website! For the sample question, we calculate the percent of cars sold as 32/50 = 64% and the percent short is (50-32)/50 = 36%
Now for the answer posted below
88/120 represents the percent of students that did not get an A
88/120 = 22/30 = 11/15 = 73%
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