Proportion Properties and Simplifying Proportions

• cd = ab

• ad = bc

• ac = bd

• All options are possible.

• 1

• 2

• 3

• 4

The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 240 people are in line?

• 32 People

• 12.5 People

• 32 Min.

• 12.5 Min.

 

A sea turtle made 460 dives in 12 hours. At this rate, how many dives did the sea turtle make in 3 hours?

• 165 dives

• 115 hours

• 115 dives

• 165 hours

What is a ratio?

• A relationship between two different things

• A relationship between two similar things

• A relation between two same things

• A relationship between nothing

Which of the following situations form a proportional relationship?

(More than one answer)

• 5 DVDs for $9 and 15 DVDs for $27

• 12 cans for $3 and 30 cans for $7.50

• 2 ink cartridges for $25 and 4 ink cartridges for $75

• 3 pocketbooks for 60 and 5 pocketbooks for $90

• 6 cups of coffee for $8 and 9 cups of coffee for $12

What is a proportion? 

• A relationship between two equal variables

• A relationship between two different ratios

• A relationship between two equal ratios

• A relation between two different variables

What is 25% of 80?

• 20%

• 2.0

• 20

• 0.20

 

 Jack is learning to save, spend, and give away 10% of his summer job earnings. If he gives away $256, how much did he earn this summer?

• $256

• $2.56

• $25.60

• $2,560