We need to apply the formula to convert Fahrenheit degrees to Celsius degrees:
[tex]C=(F-32)\cdot\frac{5}{9}[/tex]We have 63 Fahrenheit degrees, then:
[tex]C=(63-32)\cdot\frac{5}{9}=31\cdot\frac{5}{9}=\frac{155}{9}=17.2222\ldots[/tex]Rounding the result for the nearest tenth (1/10) of a degree, we finally have:
[tex]C=17.2[/tex]Or 63 Fahrenheit degrees are equivalent to 17.2 Celsius degrees.