How much is 70 degrees Fahrenheit in Celsius?

1 Answer
Mar 12, 2017

Answer:

#70^@F = 21.bar(1)^@C#

Explanation:

To convert Fahrenheit to Celsius, the normal method is to subtract #32# then divide by #1.8# (i.e. #9/5#).

So in our example:

#5/9(70-32) = 5/9(38) = 190/9 = 21.bar(1)#

Alternatively, since #-40^@F = -40^@C#, we can convert by adding #40#, multiplying by #5/9#, then subtracting #40#:

#5/9(70+40)-40 = 5/9(110)-40 = 550/9 - 40 = 61.bar(1)-40 = 21.bar(1)#

The reverse conversion from Celsius to Fahrenheit can be done by either of the following:

  • Multiply by #9/5# then add #32#.

  • Add #40#, multiply by #9/5#, then subtract #40#.