Oranges cost $4.55 for 7 lb. At that rate, how many pounds of oranges can you buy for $7.15?
step 1
Find the unit rate
divide the total cost by the total pounds
so
4.55/7=$0.65 per lb
step 2
Applying proportion
$0.85/1 lb=$7.15/x
solve for x
x=7.15/0.65
x=11 lb
therefore
the answer is 11 pounds