Module 2 Review

Front

What is a percent and how is it commonly used in real-world applications?

Back

A percent is a ratio expressed as a fraction of 100. It is commonly used in finance (interest rates), statistics (data representation), and everyday situations (discounts, sales tax).

Front

How do you calculate the total amount after applying a percentage increase?

Back

To calculate the total amount after a percentage increase, multiply the original amount by the percentage (as a decimal) and add it to the original amount. Formula: Total = Original Amount + (Original Amount * Percentage).

Front

What is the formula to find a percentage of a given number?

Back

The formula to find a percentage of a given number is: Percentage = (Part/Whole) * 100.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator, then multiply the result by 100. For example, 22/25 = 0.88 * 100 = 88%.

Front

What is the relationship between decimals and percentages?

Back

Decimals and percentages are two ways of expressing the same value. To convert a decimal to a percentage, multiply by 100. For example, 0.75 = 75%.

Front

What does it mean to find a percentage decrease?

Back

Finding a percentage decrease involves calculating how much a value has decreased relative to its original amount. Formula: Percentage Decrease = (Decrease/Original Amount) * 100.

Front

How can you use percentages to compare two quantities?

Back

Percentages can be used to compare two quantities by expressing each quantity as a percentage of a common base, allowing for easier comparison of their relative sizes.

Front

What is the significance of 100% in percentage calculations?

Back

100% represents the whole or total amount. Any percentage above or below 100% indicates an increase or decrease relative to the whole.

Front

How do you calculate the percentage of a total amount?

Back

To calculate the percentage of a total amount, divide the part by the total and multiply by 100. Formula: Percentage = (Part/Total) * 100.

Front

What is a common mistake when calculating percentages?

Back

A common mistake is failing to convert the percentage to a decimal before performing calculations, leading to incorrect results.