12 degree decrease
20 degrees Celsius is 68 degrees Fahrenheit. 45 degrees Celsius is 113 degrees Fahrenheit. So 25 degrees change Celsius = 25 x 1.8 = 45 degrees Fahrenheit. 1 degree change in Celsius is equivalent to 1.8 degrees change in Fahrenheit. Scroll down to related links and look at "Conversion of Temperature Units".
68 degrees Fahrenheit = 20 degrees Celsius
1
20 degrees Fahrenheit - 30 degrees Fahrenheit = -10 degrees Fahrenheit
(-20) degrees Fahrenheit = -28.8 degrees Celsius.
20
20 degrees Fahrenheit is colder.
-20 degrees Celsius = -4 degrees Fahrenheit
20 Celsius is 68 Fahrenheit.
-8 degrees Fahrenheit is warmer than -10 degrees Fahrenheit.
20 degrees Celsius = 68 degrees Fahrenheit.
(-20) degrees Celsius = -4 degrees Fahrenheit.