All GED Math Resources
Example Questions
Example Question #421 : Numbers And Operations
Solve the proportion:
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?
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:
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?
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:
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?
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:
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:
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:
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:
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: