Description
What our Percentages – Finding the Percent lesson plan includes
Lesson Objectives and Overview: Percentages – Finding the Percent teaches students how to use the proportion method to find the percent in a percentage math problem. At the end of the lesson, students will be able to calculate the missing percent of percentage problems using the proportion method. This lesson is for students in 5th grade and 6th grade.
Classroom Procedure
Every lesson plan provides you with a classroom procedure page that outlines a step-by-step guide to follow. You do not have to follow the guide exactly. The guide helps you organize the lesson and details when to hand out worksheets. It also lists information in the blue box that you might find useful. You will find the lesson objectives, state standards, and number of class sessions the lesson should take to complete in this area. In addition, it describes the supplies you will need as well as what and how you need to prepare beforehand.
Options for Lesson
Included with this lesson is an “Options for Lesson” section that lists a number of suggestions for activities to add to the lesson or substitutions for the ones already in the lesson. One optional addition to this lesson is to have your students use the newspaper or Internet to find changes in prices to find the percent of the increase or decrease. If you have any students who are struggling with the lesson material, you can reexamine the concept of percent as a fraction out of 100. If you have more advanced students, you begin to incorporate percentages greater than 100 and discuss the meaning of a percent over 100.
Teacher Notes
The teacher notes page includes lines that you can use to add your own notes as you’re preparing for this lesson.
PERCENTAGES – FINDING THE PERCENT LESSON PLAN CONTENT PAGES
Percentages – Finding the Percent
The Percentages – Finding the Percent lesson plan includes two content pages. It’s important to learn how to calculate percentages, parts, and the whole. You will often only have two of the three components and must solve for the missing piece.
To find a missing part, you can use the proportion method. This method sets the pieces up as two ratios or fractions. Using this method is an easy way to solve these problems.
The proportion method is set up as part/whole = percent/100. The percent is the number with the percent sign, the part is the number with the word “is,” and the whole is the number with the word “of”. The 100 is constant, because a percent is always a number out of 100.
Examples
Let’s look at an example. 2 is what percent of 8? To solve, we first need to figure out what part is missing. Because the question includes the phrase “what percent,” we know that we need to find the percent. Next, we need to determine which numbers correspond to which pieces of the proportion. The whole is the number with the word “of” and the part is the number with the word “is,” so the whole is 8 and the part is 2.
Next, we plug the numbers into the proportion: 2/8 = x/100, where x is the unknown percent. We then cross multiply the find the missing percent: 2*100 = 8*x becomes 200 = 8x, which becomes 200/8 = 8x/8, which gives us our final answer of 25 = x. Therefore, the final answer is that 2 is 25% of 8.
Let’s look at another example. 14 is what percent of 210? To solve, we multiply the two numbers found diagonally from one another and divide by the remaining number: 2*100/210=6.67. Therefore, our final answer is that 14 is 6.67% of 210.
PERCENTAGES – FINDING THE PERCENT LESSON PLAN WORKSHEETS
The Percentages – Finding the Percent lesson plan includes four worksheets: an activity worksheet, a practice worksheet, a homework assignment, and a quiz. You can refer to the guide on the classroom procedure page to determine when to hand out each worksheet.
COLORING PAGE ACTIVITY WORKSHEET
For the activity worksheet, students will use at least three different colors to create a coloring page. Each color should have a range for the set of solutions to the problems. For example, one of the instructions could read, “Color all answers between 0 and 20 red, 21 and 40 blue, and 41 and above green.” The students will create at least eight problems.
SOLVING PROBLEMS PRACTICE WORKSHEET
The practice worksheet asks students to solve five percent proportion problems, one of which is a word problem.
PERCENTAGES – FINDING THE PERCENT HOMEWORK ASSIGNMENT
For the homework assignment, students will solve eight problems using the proportion method.
QUIZ
This lesson also includes a quiz that you can use to test students’ understanding of the lesson material. For the quiz, students will write the proportion method formula and give a definition for each component.
Worksheet Answer Keys
This lesson plan includes answer keys for the practice worksheet, the homework assignment, and the quiz. If you choose to administer the lesson pages to your students via PDF, you will need to save a new file that omits these pages. Otherwise, you can simply print out the applicable pages and keep these as reference for yourself when grading assignments.
