Answer
$\frac{131.5}{9}\approx14.6^\circ C$
Work Step by Step
The formula is:
$C=(F-32)\times\frac{5}{9}$ where F is the Fahrenheit and C is Celsius.
Here:
$C=(58.3-32)\times\frac{5}{9}=\frac{26.3\times5}{9}=\frac{131.5}{9}\approx14.6^\circ C$