Question 941455
 x be the original price
  100 is 40 % off of x 
  hence 100 = x-40 % x
     {{{ 100 = x-(40/100)*x}}}
     {{{ 100 =x-0.4x}}}
        {{{ 100 = 0.6 x}}} 
   divide with 0.6 on both sides
 {{{ 100/0.6 = 0.6x/0.6}}}
 {{{166.67 =x}}}
   
 original price  = $166.67