Question

if cost price of 25 books is equal to selling price of 20 books calculate the gain or loss percent

Answer 1

Hey there!

CP of 25 books = SP of 20 books
 
Let CP of 1 book be x
      CP of 25 books = 25x

A/q,
       SP of 20 books = 25x
       SP of 1 books = 25x/20

∵ SP > CP , it is profit.

Profit = SP - CP
         = (25x/20) - x
         = 25x - 20x / 20 
         = 5x / 20  =x/4


Profit % = Profit *100
                  CP

 = x/4  * 100
     x

=       x    *100
       x*4  

= 25x / x

= 25 %

Answer 2

Step-by-step explanation:

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