Question

POSE
c) In selling a red herring for 92c, a
fishmonger makes a profit of 15%.
Find the cost price of the fish.

Answer 1

Let be p - the cost price

$\it p+\dfrac{15}{100}\cdot p =92|_{\cdot 100} \Rightarrow 100p+15p=9200 \Rightarrow115p=9200 \Rightarrow\\ \\ \\ \Rightarrow p=\dfrac{9200}{115}=80c$