There are 3 kinds of percent problems -- find the part, find the whole, and find the percent.
Each can be completed using a proportion.

	(part) 	(percent)
	_____ =    ________
	(whole)        100

1. Find the part.		
What's 25% of 16?		


2. Find the whole.	
What's the whole amount if 8 if 50% of the whole?


3. Find the percent.
Forty out of 50 is what percent?


There are many uses of percent problems.  They require that you know words like:
sales tax, sales tax rate, purchase price, commission, mark up, discount, rate of 
discount, tip, and sale price. Sometimes part of the whole is collected for a purpose.



Commission
John earns a 12% commission on each car he sells.
 If he sells $80,000 in cars, what is his commission?

John wishes to earn at least $15,000 in commission. 
At 12% commission, what must his total sales be?

John sold a car for $45,000 and earned $4,000 in 
commission. What is his rate of commission?






comments: commission
sales tax
tip
sales discount
"80% on" is "20% off"

Solve the proportion.

Find the part.		
What's 25% of 16?		


Find the whole.	
What's the whole amount if 8 if 50% of the whole?


Find the percent.
Forty out of 50 is what percent?






27.Explain how to mentally find the following. 
1st: 50% of 40 
2nd: 150% of 40 
3rd: 75% of 40  

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28.Explain how to mentally compute the following. 
1st: 40 out of 50 is what percent? 
2nd: 60 out of 30 is what percent? 
3rd: 15 is 50% of what number? 
4th: 30 is 150% of what number?  

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29.If you're given a marked price and a discount, 
1st: how could you find the rate of discount? 
2nd: How could you find the sale price?  
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32. 
1st: Write each of the following percents as decimals. 
2nd: Explain the general procedure for doing this computation. 
a.) 12 ½ %, 
b.) 10 ¼ %, 
c.) 8.5 %, 
d.) 13 %, 
e.) 33 1/3 %, 
f.) 66 2/3 %  
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37. Humorously complete using the proper metric prefix, customary unit, or constant. 
1.) 10 cards is 1 ___cards 
2.) The insect with 100 feet is really not a ___pede but a ___pede. 
3.) One tenth of a bell is a ___ bell. 
4.) Ratio of an igloo's circumference to its diameter: Eskimo ___ 
5.) 2000 pounds of Chinese soup: Won ___ 
6.) 1,000 aches: 1 ___hurtz 
7.) 1 million bicycles: 2 ____cycles 
8.) 2000 mockingbirds: Two _____mockingbirds 
9.) 1000 cubic centimeters of wet socks: 1 ____hosen 
10.) 10 rations: 1 ____ration