Question

cost of 5 pencils is equal to selling of 4 pencils .Find the gain percentage.​

Answer 1

25 %   will be the gain percentage .

Step-by-step explanation:

let the cost of one pencil be c ,

cost of 5 pencil = 5c

selling price of 1 be s ,

selling of 4 pencil = 4s

5c = 4s  

c = 0.8 s

gain percent  = s - c / c

                   =  s -0.8 s / 0.8 s  

                = 0.2 / 0.8  * 100

             = 25 %        

Answer 2

Answer:

Profit%= bought No. of pencils-selled no. of pencil/seller no. of pencils×100=5-4/4×100=1/5×100=20% profit