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5.5 Percent Proportion: Find the Part
Presentation
•
Mathematics
•
6th - 7th Grade
•
Practice Problem
•
Medium
Standards-aligned
Regina Jackson
Used 72+ times
FREE Resource
5 Slides • 11 Questions
1
5.5 Percent Proportion
TEKS 6.5B
I can solve problems involving percents.
2
Percent Proportion
You can use a proportion to solve problems involving percents.
One ratio is the percent. Remember that percent is always out of 100.
The other ratio is the part to whole comparison.
3
Example
75% of the 6th grade class is making a B or higher. If there are 24 students in the 6th grade class, then how many are making a B or higher?
In this example, we know that the percent is 75%, or 75 out of 100.
We also know that there are a total of 24 students, so 24 is the whole amount.
We are asked how many are making a B or higher, so we are looking for what part of the class is making a B or higher.
4
Multiple Choice
A campus survey states that 40% of students ride the bus. If there are 300 students, how many ride the bus?
Which proportion could be used to solve this problem?
100x=30040
10040=x300
300100=40x
10040=300x
5
Answer
A campus survey states that 40% of students ride the bus. If there are 300 students, how many ride the bus?
The percent is 40%, or 40 out of 100
There are a total of 300 students.
Need to find what part of the students ride the bus.
6
Remember
To solve a proportion:
Cross multiply - bottom of one ratio times top of the other ratio.
Divide by the number next to the x in the resulting equation.
7
Multiple Choice
A local zoo had 750 visitors on Saturday. If 80% of the guests lived in the same town as the zoo, how many local guests visited the zoo on Saturday?
Choose the correct proportion to solve this problem.
10080=750x
75080=100x
8
Multiple Choice
A local zoo had 750 visitors on Saturday. If 80% of the guests lived in the same town as the zoo, how many local guests visited the zoo on Saturday?
620 local guests
600 local guests
9 local guests
650 local guests
9
Multiple Choice
On an average Sunday, 460 tickets are sold. How many children's tickets were sold?
Which proportion could be used to solve this problem?
46015=100x
10015=460x
10
Multiple Choice
On an average Sunday, 460 tickets are sold. How many children's tickets were sold?
69 tickets
63 tickets
74 tickets
70 tickets
11
Multiple Choice
The zoo has 40 dispensers to buy food to feed the animals. Thirty percent of the dispensers are for land animals. How many of the dispensers are for land animals?
13 dispensers
15 dispensers
10 dispensers
12 dispensers
12
Multiple Choice
Of the 250 visitors on Friday, 54% of them stayed until the zoo closed. About how many visitors stayed until the zoo closed?
130 visitors
125 visitors
135 visitors
140 visitors
13
Multiple Choice
A guest survey showed that 325 people ordered food while at the zoo. Ninety-two percent were satisfied with their food order. How many people were not satisfied with their order?
28 people
26 people
29 people
32 people
14
Multiple Choice
There are 20 different places to get food. Twenty percent of them are ice cream shops. How many ice cream shops are in the zoo?
10 ice cream shops
3 ice cream shops
5 ice cream shops
4 ice cream shops
15
Multiple Choice
The zoo has 400 employees. 28% of them are full-time employees. How many employees work full-time?
112 full-time employees
100 full-time employees
115 full-time employees
118 full-time employees
16
Multiple Choice
Of the 400 employees, 5% of them are managers. How many managers does the zoo employ?
30 managers
20 managers
25 managers
35 managers
5.5 Percent Proportion
TEKS 6.5B
I can solve problems involving percents.
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