Question

Two point five c = 15.75

Answer 1

if ur looking for what c is then you would divide 15.75 by 2.5 which is 6.3

Answer 2

$\star$ $2.5c=15.75$ 

$\star$ $2.5c/2.5=15.75/2.5$      $Divide \ both \ sides \ by \ 2.5$ 

$\star$ $c=6.3$