
Proportions - Review
Presentation
•
Mathematics
•
7th Grade
•
Medium
+3
Standards-aligned
Kayci Troyer
Used 22+ times
FREE Resource
21 Slides • 19 Questions
1
Proportions - Review
2
Ratio vs. Proportion
Ratio: shows the relationship between the amounts of 2 DIFFERENT things
Proportion: comparing two or more ratios that are equal in value
3
Multiply Across to see if the cross products are equal
4
Determine if the following ratios are proportional
5
Multiple Choice
Q.
74=42
True
False
6
Multiple Choice
Q.
32=64
True
False
7
We can use CROSS MULTIPLICATION to find the missing number in a ratio
8
Use cross multiplication to solve the proportions
9
Multiple Choice
Q.
52=20x
x=8
x=2
x=50
10
Multiple Choice
73=x33
x=75
x=76
x=70
x=77
11
Multiple Choice
Solve the proportion:
15
5
10
12
12
We can set up and solve proportion from word problems.
13
14
Set up and solve the proportion from the following word problems
15
Multiple Choice
Hamburger meat sells for $6 for every 3 pounds. If Alicia buys 10 pounds of hamburger meat, how much will she pay?
$30
$20
$60
$10
16
Multiple Choice
12 ounce shampoo bottle lasts Mike 16 weeks. How long would you expect an 18-ounce bottle of the same brand to last him?
24 weeks
6 weeks
30 weeks
20 weeks
17
Percent Proportions
18
Determine the Part, Whole and Percent (%) - Then use cross multiplication to solve for the missing information
19
Multiple Choice
Abigail took a science test and got 36 correct and 4 incorrect answers. What was the percentage of correct answers?
94%
86%
83%
90%
20
Multiple Choice
A student made an 85% on a test with 25 questions. What is the number of questions that the student answered correctly? Round to the nearest whole number.
21 questions
22 qestions
23 questions
24 questions
21
Multiple Choice
8 is what percent of 20?
40%
20%
250%
2.5%
22
Multiple Choice
23
Percent Proportion
Tax and Tip (Gratuity)
24
25
Use percent proportion to solve for tax & tip
Make sure to READ what the question is asking for
is it asking for just the tax? or the total bill?
Is it asking for just the tip? or for the total bill?
26
Multiple Choice
Harry Potter bought Hedwig a new carrying case for $85. What amount of sales tax must he pay if the sales tax rate is 6%?
$5.10
$90.10
$79.90
$7.06
27
Multiple Choice
Thor is getting a hair cut and the price is $35. If he wants to tip 20%, what was the total amount Thor paid?
$7
$42
$28
$57.14
28
Multiple Choice
Captain America wants to buy a new helmet priced at $80. If the sales tax is 6%, what is the total amount he must pay for the helmet?
$4.80
$84.80
$75.20
$1333.33
29
Mark Up & Mark Down
Mark up: How much a retailer increases the price over what they paid for it
Mark Down: A reduction in price
30
31
32
Use percent proportion to solve for Mark Up/Down word problems
Make sure to READ what the question is asking for
is it asking for just the mark up amount? or the New price?
Is it asking for just the mark down amount? or for the new price?
33
Multiple Choice
The original price of a pair of shoes is $29.99 and their is a mark down of 10% because the shop is having a black friday sale. What is the sale amount of the pair of shoes?
$2.99
$32.99
$27
34
Multiple Choice
What is the total cost of an piano that costs $1200 with a markup of 75%?
$2100
$1275
$300
$96.30
35
Multiple Choice
In the supermarket, the cost of the purchase is $120. You must pay a 6% of taxes. How much is the total amount?
$126
$114
$127.2
$124
36
Multiple Percent Problems
37
38
Solve the following Mulit - Step Percent Proportion problems
39
Multiple Choice
Megan bought beads for $9.95. She received a 10% discount. She then paid a sales tax of 6%. How much did she pay for the beads?
$9.95
$8.95
$9.49
$1.54
40
Multiple Choice
Sam bought an $85.00 jacket for 40% off of the regular price. There is a 9% sales tax. How much did he pay for the jacket?
58.65
51
36
55.59
Proportions - Review
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