Finding the part, whole or percentage (6.5BC)

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

There are 90 girls and 60 boys in the sixth grade at a middle school. of these students, 9 girls and 3 boys write left-handed. What percentage of the sixth graders at this middle school write left-handed?

• 10%

• 8%

• 5%

• 15%

As part of a survey, 300 girls were asked to name their favorite sport. The results showed that 12 of the girls named bowling as their favorite sport. What percentage of the girls in the survey named bowling as their favorite sport?

• 4%

• 12%

• 25%

• 0.04%

In 2012 there were approximately 8,950 public libraries in the United States. A survey found that 76% of those libraries offered free access to electronic books. Based on this information, how many public libraries offered free access to electronic books in 2012?

• 8,190

• 118

• 6,802

• 760

The last time Brea played softball, she hit the ball 35% of the times she was at bat. Based on this information, how many times will Brea hit the ball the next time she plays softball if she is at bat 20 times?

• 4

• 7

• 15

• 6

Which of the option below shows a fraction correctly converted to its decimal equivalent? 

•  $\frac{3}{4}=0.5$  

•  $\frac{1}{5}=0.1$  

•  $\frac{1}{8}=0.125$  

•  $\frac{2}{3}=0.69$