

1. 
Express 0.07% as a decimal. 


A. 
0.007 
B. 
0.0007 


C. 
7.0 
D. 
0.7 


Hint 


2. 
Express .00034 as a percent. 


A. 
0.34% 
B. 
0.034% 


C. 
3.4% 
D. 
0.0034% 


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. 
0.1868% 
B. 
0.2335% 


C. 
0.934% 
D. 
0.467% 


Hint 


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


A. 
2.19 
B. 
21.9 


C. 
21,900 
D. 
0.219 


Hint 


5. 
Find 7.25 written as a percent. 


A. 
72.5% 
B. 
7,250% 


C. 
7.25% 
D. 
725% 


Hint 


