Review Percent: Tape Diagrams & Double Number Line

Front

What is a tape diagram?

Back

A tape diagram is a visual representation used to illustrate the relationships between quantities, often used in solving problems involving ratios, fractions, and percentages.

Front

What does a double number line represent?

Back

A double number line is a visual tool that shows two related quantities along two parallel lines, helping to illustrate the relationship between them, especially in problems involving ratios and proportions.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What is the formula for finding the amount of markdown?

Back

The amount of markdown can be calculated using the formula: Amount of Markdown = Original Price x Discount Rate.

Front

If a table costs $85 and has a 35% discount, what is the amount of markdown?

Back

The amount of markdown is $29.75, calculated as $85 x 0.35.

Front

What is the new price after applying a discount?

Back

The new price can be found using the formula: New Price = Original Price - Amount of Markdown.

Front

What is 42% of 95?

Back

42% of 95 is 39.9, calculated as 95 x 0.42.

Front

How do you find the original amount when given a percentage decrease?

Back

To find the original amount, divide the decreased amount by (1 - percentage decrease). For example, if 20% of a package is removed, the original amount is the remaining amount divided by 0.80.

Front

What does a decrease in a tape diagram indicate?

Back

A decrease in a tape diagram indicates that one quantity is less than another, often represented by a shorter segment compared to the original.

Front

What is the relationship between fractions and percentages?

Back