Question

a man buys a dozen cameras for $1800. He sells them at a profit of $36 each. Express his profit as a percentage of his selling price. ​

Answer 1

First of all, we need to deduce the price of a single camera:

`(1800)/(12)=150`

Now, we know that he profits 36 dollars from each camera. So, we are asking: which percentage of 150 is 36? We have

`36 = 150\cdot(x)/(100)`

This equation literally says: 36 is x-percent of 150. And we need to solve for x:

`x=(36\cdot 100)/(150) =24`