Extra: Simple Rule of Three

Perform percentage calculations quite easily. Just find the sentence that represents your problem (e.g., How much is X% Y?), fill in the fields and you're done. The sentences to help you choose the calculation are:

- How much is X% of Y?
- The value X represents how many % of Y?
- The value X represents Y% of ...
- The value X increased by Y% results in ...
- The value X decreased by Y% results in ...
- The difference between X and Y is ...%

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