In a Farmer’s market, the price of 2 apples is equal to that of 3 oranges. If a dozen of oranges cost $3, how many apples can be purchased with $18?
Cost of a single orange = $3 /12 = .25
So....3 oranges = 3 * .25 = .75
So...one apple = .75 / 2 = 37.5 cents
So
18 / .375 = 48 apples can be purchased