Percentage usually means the relative value from a total value. We use percentage for example like this:

- Our total value here is one million cars.
- And we say: "every second car is more than five years old"
- Translated to percents - "every second car" means fifty percent (50%).
- Correct answer is: half million of cars is older than five years.

One percent also means one hundredth. From above example - one hundredth (1%) from million would be one hundred thousand. \( x = \frac{1 000 000}{100} = 100 000 \\ \)

Example: How many percent is 5 cars out of 10 cars

\( Percentage = (5 / 10) \cdot 100 \\ Percentage = 50\% \)

Example: How many cars is 10% of 50 cars

\( Value = 10 \cdot (50 / 100) \\ Value = 5 \, cars \)

Example: What is TotalValue if 5 cars is 50%

\( TotalValue = 5 \cdot (100 / 50) \\ TotalValue = 10\; cars \)

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