# Fahrenheit to Celsius Formula

The degree Celsius, also known as the centigrade degree, with symbol °C is a thermodynamic unit defined by Anders Celsius in 1742 considering the freezing temperature of the water at 100°C and the boiling temperature at 0°C, later Jean-Pierre Christin in 1743 and Carlos Linneo in 1745 inverted both points, leaving the freezing temperature of the water at 0 °C and the boiling temperature of the water at 100 °C.

The degree Fahrenheit (represented as °F) is a temperature scale proposed by Daniel Gabriel Fahrenheit in 1724. The scale establishes as the freezing and boiling temperatures of water, 32 °F and 212 °F, respectively. Fahrenheit, determined the zero point by putting the thermometer in a mixture of ice, water and ammonium chloride.

Celsius = 5/9*(Fahrenheit - 32)

The equation is written

C = 5(F-32)/9

We have:

C = Celsius

F = Fahrenheit.

Fahrenheit to Celsius Questions:

1) convert 100 °f to centigrade degrees.Answer: Using the above equation we perform the temperature conversion from F = 100 °f to C.

C = 5(F-32)/9

C = 5(100 °f - 32)/9

C = 5(68)/9

C = 37.7 °C.

2) convert 215 °f to centigrade degrees.

Answer: Using the above equation we perform the temperature conversion from F = 215°f to C.

C = 5(F-32)/9

C = 5(215 °f - 32)/9

C = 5(183)/9

C = 101.6 °C.

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