At Pizza Pi, 9% of the pizzas made last week had extra cheese. If 27 pizzas had extra cheese, how many pizzas in all were made last week?

At Pizza Pi, the number of Pizzas that had extra cheese last week = 27

The percentage of Pizzas that had extra cheese last week = 9%

Let us assume that the number of Pizzas made last week = X

Then

we can write the equation as,

9X/100 = 27

9X = (27 * 100)

9X = 2700

X = 2700/9

= 300

Then it can be deducted that 300 pizzas were made last week.