Question

the cost price of sixteen notebooks is equal to the selling price of twelve notebooks. Find the gain percent

Answer 1

Let the cost price of 1 book be Re.1.

Cost price of 12 books = Rs.12

Selling price of 12 books = Rs.16

Gain = (SP - CP)
Gain = (16 - 12)
= Rs.4

Gain%=(Gain/CP∗100)%
=(4/12∗100)%
=33.3% Ans.

Ans.) The gain% is 33.3%.

Answer 2

answer:
     Let the Cost Price of one notebook be Rs 1.
  therefore , cost Price of 16 notebooks = Rs 16
             And Selling Price of 12 notebooks = Rs 16
                 or selling Price of one notebook = 16/12
                 therefore , Selling Price of 16 notebooks = 16/12*16
 Gain = selling Price of 16 Notebooks - Cost Price of 16 Notebooks 
         =16*16/12 - 16
         =16*16 - 16*12 /12
         =16 (16 - 12)/12
         =16*4/12
         =16/3
hence gain % = Gain / Cost Price of 16 Notebooks *100
                     = (16/3)/16*100
                     =16/3*1/16*100
                    = 100/3
                    Gain %=33.33%
Hope This helps You!!