Calculating Percent Change: Increase and Decrease Problems

This video tutorial explains how to calculate the percent of change using a formula. It covers both percent increase and decrease with examples, including word problems. The formula involves subtracting the original value from the new value, dividing by the original value, and multiplying by 100%. The video provides step-by-step calculations and highlights the importance of identifying whether the change is an increase or decrease.

What is the formula for calculating percent change?

• Original value divided by new value times 100

• New value divided by original value times 100

• New value minus original value divided by original value times 100

• Original value minus new value divided by original value times 100

Tags

CCSS.6.RP.A.3C

If a number changes from 30 to 42, what is the percent change?

• 25%

• 30%

• 40%

• 50%

Tags

CCSS.6.RP.A.3C

Calculate the percent change if a value increases from 40 to 70.

• 80%

• 75%

• 85%

• 50%

Tags

CCSS.6.RP.A.3C

What is the percent change if a value increases from 30 to 55?

• 83.3%

• 75%

• 70%

• 60%

Tags

CCSS.6.RP.A.3C

If a value decreases from 50 to 40, what is the percent change?

• -15%

• -20%

• -10%

• -25%

Tags

CCSS.6.RP.A.3C

In 2017, the price of gas changed from $2.24 to $2.56. What is the percent change?

• 12.5%

• 14.29%

• 15%

• 16.5%

Tags

CCSS.6.RP.A.3C

John's savings account increased from $2500 to $2900. What is the percent change?

• 17%

• 14%

• 15%

• 16%

Tags

CCSS.6.RP.A.3C

The population of cats on Island X increased from 1500 to 1750. What is the percent change?

• 18.7%

• 17.7%

• 16.7%

• 15.7%

Tags

CCSS.6.RP.A.3C

If 140 out of 500 students drop out of a class, what is the percent change?

• -30%

• -28%

• -32%

• -25%

Tags

CCSS.6.RP.A.3C

What does a negative percent change indicate?

• Percent decrease

• Error in calculation

• Percent increase

• No change

Tags

CCSS.6.RP.A.3C