In this case, we'll have to carry out several steps to find the solution.
Step 01:
data:
hot dog stand
Step 02:
We must analyze the problem to find the solution.
total money = $21
1 soft drink:
$21 - $1.25 = $19.75
hot dogs:
$19.75 / $2.50 = 7.9
The answer is:
He can purchase 7 hot dogs