Finding the Percentage, Part, Whole

On Wednesday 72% of the customers who bought gas at a gas station made additional purchases. There were 250 customers who bought gas. How many of these 250 customers made additional purchases?

Yesterday 170 guests at a hotel called for room service, and 255 guests did not call for room service. What percentage of the guests at this hotel called for room service yesterday?

• 60%

• 15%

• 40%

• 85%

A shop owner offered a 20% discount off the regular price of a mirror. The amount of the discount is $3.

What is the regular price of the mirror?

• $15

• $6

• $9

• $18

Customers at an ice-cream shop took a survey. The results showed that 144 customers rated the shop as being "very satisfactory." This number represented 45% of the total number of customers who took the survey.

What was the total number of customers who took the survey?

• 189

• 65

• 99

• 320

64 is 40% of what number? 

• 160

• 104

• 25.6

• 108

64 is 40% of what number? 

• 160

• 104

• 25.6

• 108

7 is 25% of...

• 100

• 14

• 28

• 56

20 is 80% of what number?

• 25

• 24

• 26

• 20

67.1 is 55% of what number?

• 122

• 36.905

• 1.22

• 36

Find 12% of 1250.

• 150

• 175

• 25

• 208