

1. 
Express 830% as a decimal. 


A. 
83.0 
B. 
0.83 


C. 
8.3 
D. 
0.083 


Hint 


2. 
Which of the following is not reasonable? 


A. 
The weight of a mouse is 0.60% the weight of a lion. 


B. 
Last year's sales were 108% of this year's sales. 


C. 
The cost of gasoline is 120% of last year's cost. 


D. 
The number of household microwaves today are 0.95% of the microwaves in 1980. 


Hint 


3. 
In a sample of air containing about 500 liters, 4.67 liters of the element Argon was found. What percentage of the air is Argon? 


A. 
0.2335% 
B. 
0.1868% 


C. 
0.467% 
D. 
0.934% 


Hint 


4. 
The number of U.S. households with cable television increased 219% between 1981 and 2001. Write 219% as a decimal. 


A. 
0.219 
B. 
2.19 


C. 
21.9 
D. 
21,900 


Hint 


5. 
Find 7.25 written as a percent. 


A. 
7.25% 
B. 
72.5% 


C. 
725% 
D. 
7,250% 


Hint 


