Sasha's Running Time and Percent Change

This video tutorial explains how to solve word problems involving percent increase and decrease. It uses an example of Sasha's running time to demonstrate the calculation of percent change. The tutorial walks through the steps of identifying the amount of change and the original amount, applying the percent change formula, and interpreting the result. By the end, viewers will understand how to calculate and interpret percent changes in various contexts.

What type of problems will you be solving in this section?

• Trigonometry problems

• Geometry problems

• Percent increase and decrease

• Algebraic equations

What was Sasha's running time last year for one mile?

• 8 minutes

• 9 minutes

• 10 minutes

• 11 minutes

What is Sasha's new running time for one mile this year?

• 6 minutes

• 7 minutes

• 9 minutes

• 8 minutes

What is the formula used to calculate percent change?

• Original amount divided by change times 100

• Change divided by original amount times 100

• Change times original amount divided by 100

• Original amount times change divided by 100

What was the amount of change in Sasha's running time?

• 4 minutes

• 3 minutes

• 2 minutes

• 1 minute

What was Sasha's original running time?

• 9 minutes

• 11 minutes

• 10 minutes

• 8 minutes

How do you express a decimal as a percentage?

• Divide by 100

• Multiply by 100

• Subtract 100

• Add 100

By what percent did Sasha's running time improve?

• 25%

• 20%

• 15%

• 10%

If Sasha's running time improved by 2 minutes, what was her original time?

• 8 minutes

• 9 minutes

• 10 minutes

• 11 minutes

What is the first step in calculating percent change?

• Divide by the original amount

• Multiply by 100

• Find the amount of change

• Find the original amount