Percent Formula

What formula helps us identify percent change?

• % Part

  ____ = ____

  100 Whole

• K= Y/X

• X/Y= %

Given the question below, identify what part of the percent formula are we finding. Thirty-Five percent of stores in town do not have security systems. If there are 25 stores in town, how many do not have security systems?

• Part

• Whole

• Percent

If you have 5 slices of pizza and no one eats any of the pizza, what percent of the pizza do you have?

• 50%

• 75%

• 100%

• 150%

Two thousand people attended a concert. Of those concert attendees 15% had back stage passes. How many attendees got to have the back stage experience?

• 324 concert attendees

• 150 concert attendees

• 300 concert attendees

• 200 concert attendees

Solve using the percent proportion: 
What number is 20% of 102?

• 204

• 122.4

• 20.4

• 20

Solve using the percent proportion: 
38% of 81 is what number?

• 33.81

• 30.78

• 31.2

• 38.81

• 16

• 25

• 100

• 40

• 30

• 40

• 50

• 60

If an ice cream shop sells 50 milkshakes that are chocolate in a day, which makes up 60% of the milkshake flavors sold. How many milkshakes does the shop sell per day?

• 96

• 120

• 85

• 140

What type of percent problems can you use this setup for?

• Percent Change

• Markdowns

• Markups

• Commission