Percent Increase and Decrease Concepts

This video tutorial covers the concept of percent change, including both percent increase and decrease. It provides examples to illustrate how to calculate the percent increase from 8 to 13 and the percent decrease from 49 to 35. The tutorial also includes an application problem involving soccer goals to demonstrate real-world application of these concepts. The video emphasizes understanding the calculation process and rounding percentages.

What does the percent of change indicate?

• The total sum of the original and new quantities

• The ratio of the new amount to the original amount

• The absolute difference between two quantities

• How much a quantity has increased or decreased compared to the original

How do you calculate the percent of change?

• Multiply the difference by the original amount

• Divide the difference by the original amount and convert to a percentage

• Subtract the original amount from the new amount

• Add the difference to the original amount

In the video game example, what is the original number of video games?

• 5

• 8

• 13

• 10

What is the percent increase from 8 to 13 video games?

• 75%

• 62.5%

• 50%

• 80%

What is the first step in calculating the percent increase?

• Divide the new amount by the original amount

• Find the sum of the original and new amounts

• Subtract the original amount from the new amount

• Multiply the original amount by the new amount

In the percent decrease example, what are the original and new values?

• 49 and 35

• 35 and 49

• 25 and 15

• 15 and 25

How is the fraction 14/49 simplified in the percent decrease example?

• 4/7

• 3/7

• 1/3

• 2/7

What is the percent decrease from 49 to 35?

• 30%

• 29%

• 27%

• 28.6%

What is the purpose of rounding percentages?

• To simplify the representation of percentages

• To increase the accuracy of percentages

• To make calculations more complex

• To change the original values

When rounding to the nearest tenth, what is the rounded value of 28.57?

• 29.0

• 28.5

• 28.6

• 28.7