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The registration fee for a used car is 0.8% of the sale price of $5,700. What is the price?

1 Answer

4 votes

Answer:

$45.6

Explanation:

1. We assume, that the number 5700 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 5700 is 100%, so we can write it down as 5700=100%.

4. We know, that x is 0.8% of the output value, so we can write it down as x=0.8%.

5. Now we have two simple equations:

1) 5700=100%

2) x=0.8%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

5700/x=100%/0.8%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 0.8% of 5700

5700/x=100/0.8

(5700/x)*x=(100/0.8)*x - we multiply both sides of the equation by x

5700=125*x - we divide both sides of the equation by (125) to get x

5700/125=x

45.6=x

x=45.6

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