Percent Increase and Change Concepts

This video tutorial covers module 5.1a, focusing on finding percent increase. It begins with a vocabulary review of proportions and ratios, then introduces the concept of percentages and percent change. The tutorial provides detailed steps for calculating percent increase, including real-life examples and scenarios. It also explains how to check calculations and use calculators effectively. The lesson concludes with a brief introduction to the next topic, percent decrease.

What is a proportion?

• A method to calculate percent increase

• A ratio comparing a part to the whole using 100

• An equation stating two ratios are equivalent

• A comparison of two quantities by division

How is percent change calculated?

• By dividing the original amount by the amount of change

• By subtracting the original amount from the new amount

• By dividing the amount of change by the original amount

• By multiplying the original amount by the percent change

If a gallon of milk increases from $3 to $3.50, what is the percent increase?

• 17%

• 10%

• 20%

• 15%

How do you convert 25% to a decimal?

• 25.0

• 0.025

• 0.25

• 2.5

What does a 100% increase mean in terms of salary?

• The salary increases by 10%

• The salary doubles

• The salary remains the same

• The salary is halved

If a pair of jeans increases in price from $40 to $50, what is the percent increase?

• 30%

• 20%

• 15%

• 25%

What is the first step in calculating percent increase?

• Multiply the original amount by the percent increase

• Subtract the original amount from the new amount

• Add the original amount to the new amount

• Divide the new amount by the original amount

How can you verify your percent increase calculation?

• By adding the percent increase to the original amount

• By multiplying the percent increase by the original amount

• By subtracting the percent increase from the original amount

• By dividing the percent increase by the original amount

What is the decimal equivalent of 100%?

• 0.01

• 1.0

• 0.1

• 10.0

Why is a percent increase always positive?

• Because the original amount is always zero

• Because the greater value is subtracted from the lesser value

• Because the lesser value is subtracted from the greater value

• Because the original amount is always negative