Percentages and Percentage Change

The video tutorial explains the concept of percentages, emphasizing their conversion to fractions and decimals. It covers methods for calculating percentage increases and decreases using the unitary and decimal methods. The tutorial introduces multiplying factors for simplifying these calculations and concludes with steps to calculate percentage change, useful for determining profit or loss.

What is the primary concept of percentages as introduced in the video?

• Percentages are always less than 50.

• Percentages are only used in finance.

• Percentages are out of 100.

• Percentages cannot be converted to decimals.

Which method involves finding one percent and then scaling up to find the percentage of an amount?

• Algebraic method

• Unitary method

• Decimal method

• Graphical method

How do you determine the multiplying factor for a percentage increase?

• Divide the percentage by 100.

• Multiply the percentage by 10.

• Add the percentage to 100 and divide by 100.

• Subtract the percentage from 100 and divide by 10.

What is the multiplying factor for a 42% decrease?

• 0.58

• 1.42

• 0.42

• 1.58

To calculate percentage change, what is the first step?

• Find the difference between the original and new values.

• Divide the new value by the original value.

• Multiply the new value by 100.

• Add the original and new values.