Answer:
You can only buy 7 packages. Each package cost $2.50
Explanation:
Alright so the cost of 21 packages of grapes cost $52.50 dollars.
So to get how much 1 package cost you divide 21 into 52.50
so 52.50 divided by 21= 2.5
So each package cost $2.50
So you have $17.50 to spend
so take 2.50 and divided that by 17.50
17.50 divided by 2.5= 7 so you can only by 7 packages for $17.50