**Definitions:**

**Celsius** (abbreviations: **C, or °C, or deg C**): also known as centigrade, is a SI metric scale and unit of measurement for temperature and used by most countries in the world. It is named with regard to the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale.

**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.

## How to Convert Degree Celsius to Degree Rankine

*Example: How many degree Rankine are equivalent to 98.66 degree Celsius?*

As;

1 degree Celsius = (X+273.15)*(9/5) degree Rankine

98.66 degree Celsius = Y degree Rankine

Assuming Y is the answer, and by substitution principle;

Y equals ( (98.66+273.15)*(9/5) ) over 1, where X is substituted by 98.66

(i.e.) Y = ( (98.66+273.15)*(9/5) ) / 1 = 669.258 degree Rankine

Answer is: 669.258 degree Rankine are equivalent to 98.66 degree Celsius.

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

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

( i ) 55.55 C

( ii ) 17.22 C

( iii ) 94.9 C