# Changing Farenhiet into a celsius

• Aug 20th 2008, 07:30 AM
Changing Farenhiet into a celsius
I'm not understanding the whole degrees celsius= 5/9 ( degrees celsius - 32).

Is there any other way that this can be explained? A more simpler way?

Say I need to change 77 degress farenhiet. How would I go about changing that to degrees celsius?
• Aug 20th 2008, 08:21 AM
masters
Quote:

I'm not understanding the whole degrees celsius= 5/9 ( degrees celsius - 32).

Is there any other way that this can be explained? A more simpler way?

Say I need to change 77 degress farenhiet. How would I go about changing that to degrees celsius?

• Take the temperature in Fahrenheit subtract 32.
• Divide by 1.8.
• The result is degrees Celsius.
• Aug 20th 2008, 08:31 AM
TKHunny
Establish the Facts.

Celsius

Freezing = 0º
Boiling = 100º

Farenheit

Freezing = 32º
Boiling = 212º

Establish the Model. I believe it to be linear

ºC = B*(ºF - A)

Apply the Facts

0ºC = B*(32ºF - A)
100ºC = B*(212ºF - A)

Solve for the Model Parameters

I will leave this to the interested student. That would be you.

Hint: From the first equation, the value of A should be relatively obvious.

Check with Other Known Values

It is widely known that -40ºC = -40ºF and not quite so widely known that 40ºC = 104ºF. Make sure your values work for these two.

Exploration: Once you get A and B, solve the Model Equation for ºF and create the formula for conversion in the other direction. It will be fun!
• Aug 21st 2008, 05:15 AM