Population Change and Percent Decrease

The video tutorial explains how to solve a word problem involving population decrease and percent change. The problem involves calculating the population of a city five years ago, given a consistent annual decrease of 1.5%. The instructor guides through setting up the equation, understanding percent decrease, and solving for previous years' populations by working backward. The tutorial emphasizes the importance of correctly interpreting percent change and provides a step-by-step approach to finding the solution.

What is the main challenge in solving the population problem presented in the video?

• Understanding the concept of percent increase

• Calculating the current population

• Finding the population of a different city

• Determining the population from five years ago using percent decrease

If a population decreases by 1.5% each year, what percentage of the population remains each year?

• 98.5%

• 100%

• 1.5%

• 99%

What is the decimal equivalent of 98.5% used in the calculations?

• 0.985

• 0.95

• 0.9850

• 0.0985

In the percent equation, what does 'A' represent?

• The percentage itself

• The original amount before the percent is applied

• The change in population

• The new amount after the percent is applied

How do you calculate the population from one year ago using the current population and the percent decrease?

• Multiply the current population by 0.985

• Subtract 1.5% from the current population

• Divide the current population by 0.985

• Add 1.5% to the current population

What was the population one year ago if the current population is 89,052?

• 89,000

• 88,000

• 90,408

• 91,000

What is the pattern used to calculate the population for each previous year?

• Add 1.5% each year

• Subtract 1.5% each year

• Multiply by 0.985 each year

• Divide by 0.985 each year

What was the population two years ago?

• 93,183

• 90,408

• 91,785

• 94,602

What was the population three years ago?

• 91,785

• 93,183

• 94,602

• 96,042

What was the population five years ago?

• 96,042

• 91,785

• 94,602

• 93,183