This document provides a lesson on solving percent problems. It includes an example problem set where students must identify the percent, whole, or part that is missing from word problems. It also includes an exercise where students calculate discounts on clothing items and the total cost of an outfit after discounts. The lesson summary restates that percent problems involve the part, whole, and percent, and that tables, diagrams or models can be used to solve for missing values.

1. Lesson 27
NYS COMMON CORE MATHEMATICS CURRICULUM
6•1
Lesson 27:Solving Percent Problems
Classwork
Example 1
Solve the following three problems.
Write the words PERCENT, WHOLE, PART under each problem to show which piece you were solving for.
of
= _________________
of ______________ =
out of
= ______________%
How did your solving method differ with each problem?
Lesson 27:
Date:
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Solving Percent Problems
11/18/13
S.121
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2. Lesson 27
NYS COMMON CORE MATHEMATICS CURRICULUM
6•1
Exercise 1
Use models, such as
situation.
grids, ratio tables, tape diagrams or double number line diagrams, to solve the following
Priya is doing her back to school shopping. Calculate all of the missing values in the table below, rounding to the nearest
penny, and calculate the total amount Priya will spend on her outfit after she received the indicated discounts.
Shirt
(25% discount)
Original Price
Pants
(30% discount)
Shoes
(15% discount)
$44
Amount of
Discount
Necklace
(10% discount)
Sweater
(20% discount)
$20
$15
$9
$7
What is the total cost of Priya’s outfit?
Lesson 27:
Date:
©2013CommonCore,Inc. Some rights reserved.commoncore.org
Solving Percent Problems
11/18/13
S.122
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

3. NYS COMMON CORE MATHEMATICS CURRICULUM
Lesson 27
6•1
Lesson Summary
Percent problems include the part, whole and percent. When one of these values is missing, we can use tables,
diagrams, and models to solve for the missing number.
Problem Set
1.
Mr. Yoshi has
papers. He graded
did each person grade?
2.
Mrs. Bennett has graded
of her
Lesson 27:
Date:
©2013CommonCore,Inc. Some rights reserved.commoncore.org
papers, and he had a student grade the rest. What percent of the papers
students’ papers. How many papers does she still need to finish?
Solving Percent Problems
11/18/13
S.123
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.