Question 1130342
{{{ ((4/5) / c) = 2/5 }}}
One way to go…<br>

Multiply both sides by c:
{{{  (4/5) = (2c)/5 }}}<br>

Multiply both sides by 5:
{{{  4  = 2c }}} <br>

Divide both sides by 2:
{{{  2 = c }}}   <<< answer, c = 2