Review Percent: Tape Diagrams & Double Number Line

Front

What is a tape diagram?

Back

A tape diagram is a visual representation used to show the relationship 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 sets of numbers, helping to illustrate the relationship between them, often used for comparing ratios or rates.

Front

How do you calculate a percentage decrease?

Back

To calculate a percentage decrease, subtract the new value from the original value, divide by the original value, and multiply by 100.

Front

If a quantity decreases by 20%, what fraction of the original quantity remains?

Back

Front

What is the formula to find the new price after a percentage decrease?

Back

New Price = Original Price × (1 - Percentage Decrease) / 100.

Front

How do you find 100% of a value?

Back

100% of a value is the value itself.

Front

What does it mean if a tape diagram shows an increase?

Back

It indicates that one quantity is greater than another, often represented by a longer segment for the larger quantity.

Front

What does it mean if a tape diagram shows a decrease?

Back

It indicates that one quantity is less than another, often represented by a shorter segment for the smaller quantity.

Front

How do you represent a 20% decrease in a number using a tape diagram?

Back

You would show the original number as a full segment and the decreased amount as a segment that is 20% shorter.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100 and adding a percent sign.