Everyday Percent Problem Solving

This video tutorial by Kirk Weiler focuses on solving everyday percent problems. It covers the use of percentages in real-world scenarios like grades, weather forecasts, taxes, and sales. The lesson explains how to convert percentages into fractions and highlights the ease of finding 10% of a number by dividing by 10. It also demonstrates how to scale this method to find other percentages like 20%, 30%, and 5%, and how to combine these shortcuts to calculate percentages like 15% and 25%. The tutorial emphasizes practical applications and quick calculations.

Which of the following is NOT a common real-world example of percentages?

• Grades

• Weather forecasts

• Distance measurement

• Sales tax

If a shirt originally costs $40 and is on sale for 50% off, how much do you pay?

• $20

• $30

• $25

• $15

What is 25% of 100 in fraction form?

• 1/2

• 1/4

• 1/10

• 1/5

How do you find 10% of a number quickly?

• Multiply by 100

• Divide by 10

• Multiply by 10

• Divide by 100

If Quinn has $250 and spends 10% on fast food, how much does he spend?

• $30

• $35

• $25

• $20

If a restaurant bill is $60 and you want to leave a 20% tip, how much should you leave?

• $10

• $18

• $12

• $15

Lev scored 61 out of 70 on a test. Did he score above 90%?

• Yes, he scored 91%

• No, he scored 87%

• Yes, he scored 90%

• No, he scored 89%

What is 5% of $84?

• $6.20

• $4.20

• $5.20

• $8.40

If Leon's rent is $640 and it increases by 15%, what will be her new rent?

• $720

• $736

• $700

• $750

How can you find 15% of a number using the 10% and 5% shortcuts?

• Multiply 10% by 1.5

• Divide 10% by 2 and add 5%

• Add 10% and 5%

• Subtract 5% from 20%