GED Math : GED Math

Study concepts, example questions & explanations for GED Math

varsity tutors app store varsity tutors android store

Example Questions

Example Question #421 : Numbers And Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross-multiply both sides.

Divide by four on both side.

Simplify the left side.

The answer is:  

Example Question #421 : Ged Math

What is 20% of 45?

Possible Answers:

Correct answer:

Explanation:

To find a percentage of a number, we will multiply the two together. So, we get

 

 

We can simplify to make things easier. The zero in 20 and the zero in 100 can cancel. So, we get

 

 

 

 

 

Therefore, 20% of 45 is 9.

Example Question #422 : Numbers And Operations

Solve:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply both sides.

Distribute both sides.

Subtract  on both sides.

Subtract 8 on both sides.

Divide by 14 on both sides.

The answer is:  

Example Question #423 : Numbers And Operations

What is 15% of 40?

Possible Answers:

Correct answer:

Explanation:

To find a percentage of a whole number, we will multiply the two together. So, we get

 

 

 

Now, the zero in 100 can cancel the zero in 40. We get

 

 

 

 

 

Therefore, 15% of 40 is 6.

Example Question #424 : Numbers And Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the fractions.

Divide by two on both sides.

Square root both sides.

Verify that both the positive and negative roots will satisfy the solution.

The answer is:  

Example Question #421 : Numbers And Operations

What is 25% of 240?

Possible Answers:

Correct answer:

Explanation:

To find a percentage of a whole number, we will multiply the two together. So, we get

 

 

 

Now, the zero in 100 and the zero in 240 can cancel. We get

 

 

 

 

 

 

Therefore, 25% of 240 is 60.

Example Question #426 : Numbers And Operations

Solve the proportion:   

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

Distribute the terms on the left.

Subtract  from both sides.

Divide by negative seven on both sides.

The answer is:  

Example Question #421 : Numbers And Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

Expand both sides.

Subtract  on both sides.

Divide by seven on both sides.

The answer is:  

Example Question #61 : Proportions And Percentages

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the fractions.

Subtract  from both sides.

Add 18 on both sides.

The answer is:  

Example Question #422 : Numbers And Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

 

Expand both sides.

Add 18 on both sides.

Divide by 6 on both sides.

Reduce both fractions.

The answer is:  

Learning Tools by Varsity Tutors