First, we need to determine how many feet Ian runs in a week. We begin this by multiplying the number of laps by the number of feet per lap, performing 5*100= 500 feet per day.
Since there are 5 days in the period being measured, this means Ian runs 500*5= 2500 feet jogged.
Since it takes 25 feet of jogging to burn a calorie, this means Ian burns 2500/25=100 calories burned jogging throughout the week.
Ian is looking to lose some weight.  He decides to start jogging around his apartment complex every night to burn some calories.  He does 5 laps around the complex every night.  Each lap is 100 feet.  If it takes 25 feet of jogging to burn a calorie, how many calories does Ian burn after 5 days of jogging like this?