**Definitions:**

**Rankine** (abbreviations: **R, or °R, or deg R**): is a thermodynamic temperature based on an absolute scale named with regard to the Glasgow University engineer and physicist William John Macquorn Rankine, who proposed it in 1859.

**Fahrenheit** (abbreviations: **F, or °F, or deg F**): is a temperature scale based on one proposed in 1724 by Amsterdam-based physicist Daniel Gabriel Fahrenheit (1686–1736), with regard to whom the scale is named.

## How to Convert Degree Rankine to Degree Fahrenheit

*Example: How many degree Fahrenheit are equivalent to 68.47 degree Rankine?*

As;

1 degree Rankine = X-459.67 degree Fahrenheit

68.47 degree Rankine = Y degree Fahrenheit

Assuming Y is the answer, and by substitution principle;

Y equals ( 68.47-459.67 ) over 1, where X is substituted by 68.47

(i.e.) Y = ( 68.47-459.67 ) / 1 = -391.2 degree Fahrenheit

Answer is: -391.2 degree Fahrenheit are equivalent to 68.47 degree Rankine.

*Practice Question: Convert the following units into F:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 87.26 R

( ii ) 99.5 R

( iii ) 94.06 R