SOLUTION: thw walzer's average phone bill increased from $16.65 to $19.98. What is the percent of average?

Question 760959: thw walzer's average phone bill increased from $16.65 to $19.98.
What is the percent of average?
Answer by 2897696(96) (Show Source): You can put this solution on YOUR website!
To solve this problem we can use a proportion, difference/original=x/100.
Here, the difference means the number of increase or decrease between the original number and the new number. To find the difference you subtract 19.68-16.65, and get 3.03.
The original means the number before the increase or decrease, and the x/100 part will help you find the percent.
DIFFERENCE:3.03
ORIGINAL:16.65
Now using the new found information, we can plug it in the proportion.
3.03 x
---- = ------
16.65 100
From here you make an equation by cross multiplying, and get:
3.30(100)=16.65x ======> 303=16.65x (solve for x)
Try solving the problem now. The answer you get, will be the percent, so no need to move any decimal over :)

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