Proportions and Percent of Change

Presentation

•

Mathematics

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6th - 7th Grade

•

Medium

•

CCSS

6.RP.A.3C, 6.RP.A.3B, 6.RP.A.1

Standards-aligned

Courtney Tout

Used 31+ times

FREE Resource

3 Slides • 22 Questions

Proportions and Percent of Change

By Courtney Tout

Comparing 2 items

Ratio

Comparison through divison

Unit Rate has a value of 1 in the denominator

Ex: Miles per hour

Rate

Two fractions set equal to each other.

Units must match either:

Vertically
Horizontally

Proportion

Multiple Choice

Elijah earns $230 for 8 hours of work. What is the unit rate (in dollars per hour)?

$25.50 per hour

$12.50 per hour

$1,840 per hour

$28.75 per hour

Multiple Choice

There are 50 cookies and 35 cupcakes leftover at a bake sale. What is the ratio of cookies to cupcakes?

Your answer must be in simplest form.

10:7

7:10

35:50

50:35

Multiple Choice

Which of these ratios is equivalent to 3:4?

12:9

9:20

9:12

803:804

Multiple Choice

What is the ratio of hearts to flashes?

4/5

5/9

4/9

5/4

Multiple Choice

You spend $40 on 5 pounds of concrete. How much would would it cost for 7 pounds of concrete?

$56

$50

$35

$42

Multiple Choice

What would be the ratio of red apples to green apples if there were double the amount of apples?

6 red apples to 8 green apples

8 red apples to 6 green apples

4 red apples to 3 green apples

3 green apples to 4 red apples

Multiple Choice

In a certain apartment building, the ratio of tenants to cars is 3:5. If there are 30 tenants, how many cars are there?

Multiple Choice

Tommy has a bag of LEGOS. There are:

6 yellow

3 red

8 blue

What is the ratio of red to blue LEGOS?

3:8

6:3

6:8

3:6

Multiple Choice

If there are 5 boys to 7 girls, how many girls would there be if the number of boys increased to 20?

35 girls

28 girls

24 girls

30 girls

Multiple Choice

For 6 people to enter the park, it cost $36. How much would it cost for 9 people?

$45.50

$48.00

$54.00

$52.50

Multiple Choice

A recipe that will make 3 pies calls for 7 cups of flour. Determine how many pies can be made with 28 cups of flour.

40 pies

4 pies

12 pies

10 pies

Multiple Choice

Daisy sour cream is $1.68 for 8 oz.

Kraft sour cream $2.08 for 16 oz.

Find the unit price of each and choose the better deal.

Daisy

Kraft

Step 1: Find the difference between New and Original Values

Step 2: Divide difference by Original Value

Step 3: Scale Up or Down to get a denominator of 100. Percent is on top.

Some text here about the topic of discussion.

Percent of Change

Multiple Choice

Which is the correct formula for percent of change?

$\frac{Original}{Origianl\ -\ New}$

$\frac{Orignal}{New-Original}$

$\frac{New\ -\ Original}{Original}$

$\frac{Oringla\ -\ New}{New}$

Multiple Choice

75 people to 25 people

Increase

Decrease

Multiple Choice

16 meters to 44.2 meters

Increase

Decrease

Multiple Choice

68 miles to 42.5 miles

Increase

Decrease

Multiple Choice

Sally went to the clearance rack at a department store and found a shirt she wanted to buy. The shirt was $36.00 and is on sale for $24.00. What is the percent of the decrease?

33%

67%

50%

34%

Multiple Choice

In 1999, the price of unleaded fuel was $1.09. In 2015, the price of unleaded fuel is $1.89. What is the percent change?

173% increase

73% increase

73% decrease

27% increase

Multiple Choice

Tickets to Disney World are $100. The price is going to increase on January 1. What is the percent of change if the cost increases to a $120?

25%

18%

20%

50%

Multiple Choice

Find the PERCENT of change.
20 dogs to 5 dogs

Decrease 15%

Increase 15%

Increase 75%

Decrease 75%

Multiple Choice

Find the PERCENT of Change.
The original cost was $50 and the new cost is $60.

Increase 20%

Increase 16.67%

Increase $10

Decrease $10

Multiple Choice

Find the percent of change if the original cost was $5 and the new cost is $1.

Increase $4

Decrease $4

Decrease 80%

Decrease 400%

Proportions and Percent of Change

By Courtney Tout

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