When in Canada, you might be thrown off when the weatherman calls for a high of 25. Up there, that's pretty warm since they use Celsius. What's the formula to convert C to F?

Answer Multiply temperature by 9/5 and add 32.

The Celsius temperature range was originally defined by setting zero as the temperature at which water froze and 100 was defined as the boiling point of water. The Fahrenheit temperature range is based on setting the freezing point of water at 32 degrees, and boiling to 212 degrees. If you do the math, you have to multiply by 9/5 and add 32.

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