Understanding Percentages and Decimals

The video tutorial covers lesson 3.1 on analyzing percents of numbers. It begins with an introduction to percents, explaining them as ratios compared to 100. The tutorial then demonstrates how to convert percents to decimals and fractions, followed by warm-up exercises for practice. Real-world applications are explored, including calculating percentages of numbers in various contexts. Examples include calculating commission and determining the edible portion of an avocado. The lesson concludes with a summary of key points, emphasizing the importance of converting between fractions, percents, and decimals.

What is a percent defined as in this lesson?

• A ratio compared to 100

• A ratio compared to 10

• A decimal representation

• A fraction of a whole

How do you convert 62% to a decimal?

• Multiply by 100

• Move the decimal two places to the right

• Move the decimal two places to the left

• Divide by 10

What is 0.29 as a percent?

• 290%

• 0.29%

• 29%

• 2.9%

How do you write 35% as a decimal?

• 3.5

• 35.0

• 0.35

• 0.035

What is the decimal equivalent of two-fifths?

• 0.2

• 0.4

• 0.5

• 0.25

How do you find 59% of 640?

• Subtract 59 from 640

• Add 59 to 640

• Divide 640 by 0.59

• Multiply 640 by 0.59

What is 20% of 3542?

• 708.4

• 354.2

• 3542

• 70.84

If 80% of 60 players are right-handed, how many are right-handed?

• 60

• 30

• 12

• 48

Olivia earns 4% commission on her sales. If she sells $7200 worth of stocks, how much does she earn?

• $288

• $72

• $720

• $28.8

What is the range of edible fruit in an 8-ounce avocado if the skin and seed make up 30-40% of its weight?

• 3.2 to 4.0 ounces

• 2.4 to 3.2 ounces

• 4.8 to 5.6 ounces

• 5.6 to 6.4 ounces