Understanding Percent Problems with Tape Diagrams

The video tutorial explains how to use tape diagrams to solve percent problems through three examples. The first example demonstrates calculating a 25% increase on $300. The second example shows how to find 19% of 120 by subtracting 1% from 20%. The final example illustrates calculating a 20% discount on a $60 pair of shoes. Each example uses a bar diagram to visually represent the problem and solution.

What is the first step in using a tape diagram to find 25% of $300?

• Start counting from 100% on the left.

• Divide the bar into four equal parts.

• Label the bar with dollar values only.

• Subtract 25% from $300.

How much is 25% of $300?

• $50

• $100

• $75

• $125

What is the new amount after increasing $300 by 25%?

• $400

• $375

• $350

• $325

How do you find 19% of 120 using a tape diagram?

• Find 20% and add 1%.

• Find 10% and double it.

• Find 20% and subtract 1%.

• Find 25% and subtract 5%.

What is 1% of 120?

• 12

• 1.2

• 24

• 2.4

What is the final result for 19% of 120?

• 23.8

• 22.8

• 21.8

• 20.8

What is the first step in calculating the discount on Joe's shoes?

• Divide the bar into five equal parts.

• Label the bar with percent values only.

• Add 20% to the original price.

• Start counting from 20% on the right.

How much is 20% of $60?

• $18

• $12

• $15

• $10

What is the amount Joe paid for his shoes after the discount?

• $48

• $50

• $40

• $45

How much did Joe save from the sale?

• $18

• $15

• $12

• $10