Rate, Ratio and Percent

A constant ratio or unit rate of two variable quantities

• proportional

• constant of proportionality

• proportion

• ratio

y=kx

• Proportional relationships can be represented by an equation in this form where k is the constant of proportionality

• A constant ratio or unit rate of two variable quantities.

• The ratios of related terms are not equal

• An equation stating that two ratios or rates are equivalent

What is a Ratio?

• Is a comparison of two quantities 

• A rate with a denominator of one

• It is when the only factor the numerator and denominator share is a one 

• Two decimals that can be multiplied

A class survey showed that 8 out of 25 students plan to travel over Thanksgiving break. How many students out of the 400 students in the entire school would you expect to be traveling over the break?

• 32 students

• 128 students

• 320 students

• 96 students

If 15 chocolate cakes will serve 120 people, how many cakes are needed for 152 people?

• 18 cakes

• 8 cakes

• 24 cakes

• 19 cakes

In Amalie's home town, the ratio of cars to people is 420 to 1000. What fraction shows this ratio in simplest form?

In a bouquet of​ flowers, there are 7 daisies and 19 roses. Write the ratio of daisies to roses in three different ways.

• 19 to 7, 19:7, 19/7

• 19 to 7, 7:19, 7/19

• 7 to 19, 7:19, 7/19

• 7 to 19, 19:7, 19/7

What is the ratio of total shapes to circles?

• 3 : 4

• 4 : 3

• 7 : 3

• 3 : 7

$279 for 9 concert tickets. Find the cost per ticket.

• $31

• $39

• $2,511

• $34

336 dimples in one golf ball. At this rate, 2016 dimples in x golf balls.

• 7

• 12

• 6

• 30