On a recent survey, 60% of those surveyed indicated that they preferred hamburgers over pizza.

if 540 people preferred hamburgers, how many people preferred pizza?

Answer: 360

Step-by-step explanation:

60% means that 60/100 prefers hamburgers over pizza

You also know that 540 preferred hamburgers aka 60% of the people.

Now you just take 540 (the 60%) and divide it by 60 to get 1%. 540/60=9

9 is 1% of the total, you take 9*100 to get 100% which is 900

Take 900-540=360 to get the pizza people.