Understanding Percentages and Rates

This video tutorial covers the basics of percentages, including how to perform basic calculations and conversions. It explains percentage increase and decrease, and provides examples of more complex problems. The video also demonstrates how to calculate percentage change and applies these concepts to real-world scenarios, such as price changes and value depreciation.

Why is it important to be comfortable with percentages in math literacy?

• They are only used in advanced math.

• They make it easier to score good marks.

• They are not relevant to real life.

• They are rarely used in exams.

How can 4% be expressed as a fraction?

• 1/4

• 1/25

• 4/10

• 4/100

What is 3.4% as a decimal?

• 0.034

• 34

• 0.34

• 3.4

How do you convert a common fraction like 3/8 to a percentage?

• Divide by 100

• Multiply by 10

• Add 100

• Multiply by 100

What is the percentage form of the decimal 1.23?

• 123%

• 0.123%

• 1.23%

• 12.3%

If you increase 250 by 14%, what is the new amount?

• 275

• 300

• 285

• 250

What is the result of decreasing 200 by 5%?

• 200

• 185

• 190

• 195

A house bought for 780,000 was sold for 5.6% more. What was the selling price?

• 850,000

• 780,000

• 823,680

• 800,000

What is the formula for calculating percentage increase?

• Difference over starting amount times 100

• Difference over final amount times 100

• Final amount over difference times 100

• Starting amount over difference times 100

A babysitter charges 25 per hour during the week and 15 more on weekends. What is the weekend rate?

• 40

• 50

• 30

• 25