Percents: Lesson 3

Percents

Lesson 3: Finding Percent

When solving for Percent

• Your unknown will be the %.

• You will be given the part and the whole - the key is determining which one is which

• Part (is)

• Whole (of) -- another word for total amount

Multiple Select

In a Find the Percent percentage problems, which values are you given?

• part

• whole

• percent

Using the Percent Proportion Table to solve for Percent

• Step 1: Input values and variable into the table

• Remember your % should have a variable this time.

• Step 2: Cross Mutliply

• Step 3: Divided

• An example is provided ->

Karl got 31 out of 42 problems correct. What is his grade as a percent?

• What do we KNOW?

• Part = 31 and Whole = 42

• What do we NOT know? The Percentage

• Percent Proportion Table: ³¹/₄₂ = ^%/₁₀₀

• Cross Multiply: 31 x 100 = 42 x %

• Divided: ³¹⁰⁰/₄₂ = % => 73.8%

In Your Journal, Try these using the Percent Proportion Table

What % of 600 is 3?

What % of 5 is 4?

65 is what % of 85?

Fill in the Blank

What % of 600 is 3?

Fill in the Blank

What % of 5 is 4?

Try this problem.

Sally has 25 books in her personal library at home. 16 of the books are Sci-Fi genre. What percent of Sally's books are Sci-Fi?

Multiple Choice

Sally has 25 books in her personal library at home. 16 of the books are Sci-Fi genre. What percent of Sally's books are Sci-Fi?

• 0.64%

• 4%

• 64%

• 6.4%

Multiple Choice

Gavin bought a box of pokemon cards. In the box there are 72 packages. He has opened 37 of the packages in the box. What percentage represents the number of packages that Gavin has opened?

• 51.3%

• 51.4%

• 51%

• 51.2%