The Réaumur temperature scale was proposed by René Antoine Ferchault de Réaumur in 1730, and it is based on the water tristate as well as Celsius, placing the 0 at the point when the liquid water freezes, and the value of 80 at the point when the liquid water boils. Its unit is represented with °Ré, with °Re, and sometimes with °r after the value.
The Fahrenheit temperature scale was proposed by Daniel Gabriel Fahrenheit in 1724 with the idea of starting from a brine solution freezes as 0, and 96 is the average temperature of human body. Its unit is represented with ℉ after the value.
The Fahrenheit temperature scale values are calculated from Réaumur using the formula $$Réaumur × {9 \over 4} + 32$$
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