Question

cost price of 20 article is same as the selling price of 16 article find the gain percent​

Answer 1

let cp of 1 article is 100

then cp of 20 article is 20*100=2000

a/q 20*100=16*s

=>s=2000/16

=>s=125

then sp of 20 article is 20*125=2500

now  

profit %=(2500-2000)*100/2000=25%