Modeling Percents with a Double Number Line

The video tutorial explains how to find the percentage of a number using visual models, specifically double number lines. It begins with an introduction to the concept and compares it to bar models and ratio tables. The tutorial then provides a detailed example using Mr. Ramos's coin collection to illustrate how to calculate percentages with a double number line. A second example involving Halloween candy further demonstrates the method. The video emphasizes understanding fraction-percent conversions and dividing number lines into equal sections to solve percentage problems effectively.

What visual model is used in the video to find percentages?

• Pie chart

• Histogram

• Bar graph

• Double number line

What percentage of Mr. Ramos's coin collection is silver?

• 40%

• 10%

• 30%

• 20%

If Mr. Ramos has 200 coins, how many are silver according to the double number line?

• 40 coins

• 60 coins

• 20 coins

• 80 coins

What fraction represents 20%?

• 1/4

• 1/8

• 1/5

• 1/6

How many sections is the number line divided into for Mr. Ramos's example?

• 7 sections

• 6 sections

• 5 sections

• 4 sections

Tags

CCSS.2.MD.B.6

What percentage of his candy did Ryan eat on the first night?

• 25%

• 20%

• 15%

• 30%

How many pieces of candy did Ryan eat on the first night?

• 15 pieces

• 30 pieces

• 20 pieces

• 25 pieces

Tags

CCSS.2.OA.A.1

What fraction is equivalent to 25%?

• 1/6

• 1/3

• 1/4

• 1/5

How many groups is 100% divided into in Ryan's example?

• 3 groups

• 4 groups

• 5 groups

• 6 groups

What is the value of each section of candy in Ryan's example?

• 25 pieces

• 20 pieces

• 30 pieces

• 15 pieces

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B