Lesson: Find Percent of a Number

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Lesson Objective

SWBAT find percent of a number

Lesson Plan

 

Standard 

6NSO.C13  Calculate given percentages of quantities and solve problems involving discounts at sales, interest earned and tips

6.DASP.2. Construct circle graphs using ratios, proportions, and percentages. 

Aim/Objective:

Key Points

·         SWBAT calculate a percent of a number

·         Percents between 0 and 99 represent parts of a whole

·         Percents above 100% represent more than the whole

Assessment:

 

Judith has a total of 8 fish in her aquarium. Exactly 75% of the fish are guppies. How many of the fish in the aquarium are guppies?

           

            A.        2

            B.        5

            C.        6

            D.        7

 

 

A baseball team won 75% of its games. If the team played 48 games, how many games did it win?

           

            A.        36

            B.        25

            C.        12

            D.        9

 

 

What is 40% of 250?

A.    50

  1. 100
  2. 150
  3. 200

 

 

At the local book store, calendar sales went up 230% from last year.  Last year, there were 50 calendars sold.  How many calendars were sold this year?

A.    1.15

B.     11.5

C.     115

D.    1150

 

Lesson

·         Remind students that fractions, decimals and percents are all different ways to represent the same thing.

·         Percents can be written as decimals by dividing by 100.  This is the same thing as moving the decimal two times to the left.

·         Students will write percents as decimals

·         Walk through reasoning before teaching students how to calculate percent of a number. 

·         If the percent is between 0 and 99 then you are going to have an end result that is less than the number

·         Use the benchmark of 50% to estimate about what your number should be.

·         Walk through the procedure to calculating percents of a number. 

·         First turn the percent into a decimal

·         Then write the equation of multiplying the decimal by number.

·         Check the answer to make sure it makes sense. 

·          

 

Lesson Resources

CW Percent of Number   Classwork
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HW Percent of Number   Homework
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Find10 of a number  
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Percent of Number Reteach  
1,250
Percent of Number prac  
1,014
U6 L13 Smooth Operator Percent of a Number  
1,145
U6 L13 Smooth Operator Percent of a Number  
499

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