Convert ${77}^{\circ }F$ to ${}^{\circ }C$.

The correct option is B ${25}^{\circ }C$
Given, temperature in Fahrenheit scale,$F={77}^{\circ }F$

If $C$ is the temperature in ${}^{\circ }Celcius$ then,
$C=\frac{5}{9}(F-32{)}^{\circ }C$
$C=\frac{5}{9}(77-32{)}^{\circ }C$
$C=\frac{5}{9}\times {45}^{\circ }C$
$C={25}^{\circ }C$

Therefore, ${77}^{\circ }F={25}^{\circ }C$