The question is
The ans is 44:45Mr.Cutler usually makes a 45% profit on every radio he sells .During a sale he reduces his margin of profit to 40% whiles his sales increase 10%.What is the ratio of his new total profit to the original profit.
I could solve this problem however the the increase in sales is throwing me off . If i dont consider increase in sales i get 8:9. Is there a relation between increase in sales to the profit earned?
Here is how i did it
Let the radio price be p.
--Now Before the sale.
Selling price = 29p/20)
Profit = (29/20)p - p = (9/20)p
--After Sale Price
Selling price =7p/5
New total profit : original profit = 8:9