Question

cost of 10 chocolate is equal to the selling price of 20 chocolate find the loss percentage.

Answer 1

let cp of 10 choc = sp of 20 choc = x
so, cp of 1 choc = x/10
      sp of 1 choc = x/20

loss = cp - sp
       = x/10 - x/20 = x/20

loss % = (loss/cp) * 100
            = ((x/20) / (x/10)) * 100
       
( when u solve this, u will get )
 
loss %  = 50 %