Change Celsius to Fahrenheit

To change Celsius to Fahrenheit:

1) multiply the Celsius temperature by 9/5

2) add 32 to the remaining number

E.g., 10 degrees Celsius = 10/1 x 9/5 = 90/5, 90 divided by 5 = 18, 18 + 32 = 50 degrees Fahrenheit.

Change Fahrenheit to Celsius

To change Fahrenheit to Celsius:

1) subtract 32 from the Fahrenheit temperature

2) multiply the remaining number by 5/9

E.g., 90 degrees Fahrenheit - 32 = 58, then 58/1 x 5/9 = 290/9, 290 divided by 9 = 32 degrees Celsius.