Final answer:
To calculate the total number of people who entered the comic store, one should divide the number of purchasers by the purchase rate. Since 45 people made purchases and the purchase rate was 30%, the total number of people who entered the store is 150.
Step-by-step explanation:
If 30% of the people that enter a comic store make a purchase, and 45 people made a purchase, we can find out how many people entered the comic store using a simple proportion.
Let the total number of people who entered the store be x. Since 30% of x made a purchase, we can set up the following equation:
0.30 x = 45
Now, we will solve for x:
x = 45 / 0.30
x = 150
Therefore, 150 people entered the comic store on an average day.