Calculating Percent Change with Proportions

This tutorial covers the concept of percent change, including both percent increase and decrease. It explains how to calculate percent change using proportions and provides examples for both increasing and decreasing scenarios. The tutorial also demonstrates how to find new amounts when given the original amount and the percent change. The session concludes with a discussion on the applications of these calculations in real-world scenarios.

What is the basic formula used for calculating percent change?

• Part divided by whole equals percent

• Whole divided by part equals percent

• Part multiplied by whole equals percent

• Whole multiplied by part equals percent

In percent change, what does the 'whole' represent?

• The amount of change

• The new amount

• The original amount

• The final amount

If a number changes from 54 to 20.52, what is the percent change?

• 38% increase

• 62% decrease

• 38% decrease

• 62% increase

When calculating percent change, what is the first step after identifying the original and new amounts?

• Divide the new amount by the original amount

• Add the original and new amounts

• Subtract the new amount from the original amount

• Multiply the original amount by the new amount

If a number changes from 223 to 243, what is the percent change?

• 8.96% increase

• 9% increase

• 8.96% decrease

• 9% decrease

When rounding to the nearest tenth, what should you do if the hundredths place is 5 or greater?

• Round down

• Ignore the hundredths place

• Keep the number as is

• Round up

Given an original amount of 45 and a 120% increase, what is the new amount?

• 120

• 45

• 99

• 54

How do you find the new amount after a percent increase?

• Subtract the amount of change from the original amount

• Add the amount of change to the original amount

• Multiply the original amount by the percent increase

• Divide the original amount by the percent increase

Given an original amount of 475 and a 44% decrease, what is the new amount?

• 475

• 209

• 44

• 266

How do you find the new amount after a percent decrease?

• Divide the original amount by the percent decrease

• Multiply the original amount by the percent decrease

• Add the amount of change to the original amount

• Subtract the amount of change from the original amount