Understanding Percentages

The video tutorial covers solving percentage problems by converting percentages to decimals and multiplying. It explains how to handle small percentages like 0.2% and introduces algebraic methods to find unknowns in percentage problems. The tutorial emphasizes the importance of understanding the problem context and performing reality checks to ensure accuracy.

What is the result of converting 15% to a decimal and multiplying it by 40?

• 5

• 6

• 7

• 8

How do you convert 0.2% to a decimal?

• 2

• 0.2

• 0.02

• 0.002

What is 0.2% of 7?

• 0.014

• 0.14

• 14

• 1.4

If 4 is 20% of a number, what is the number?

• 25

• 20

• 15

• 10

What is the decimal equivalent of 20%?

• 0.2

• 0.02

• 2

• 0.002

If 3 is 9% of a number, what is the number?

• 30

• 33.3

• 35

• 40

What is the decimal equivalent of 9%?

• 0.9

• 9

• 0.009

• 0.09

What is the importance of doing a reality check in percentage problems?

• To change the percentage

• To avoid using decimals

• To make the problem more complex

• To ensure the answer is reasonable

What is the result of 100 being 10% of a number?

• 1000

• 100

• 10

• 1

What should you do if a problem asks for 10% of 100?

• Convert 10% to a decimal and multiply by 100

• Subtract 10 from 100

• Divide 100 by 10

• Add 10 to 100