Percent Increase and Decrease in Algebra

This video lesson by Kirk Wier from eMath Instruction covers the concepts of percent increase and decrease. It begins with an introduction to the topic, followed by examples demonstrating how to calculate percent increase using a beetle population scenario and percent decrease using a cooling coffee example. The lesson emphasizes the importance of understanding these concepts for real-life applications and concludes with a summary of the key points discussed.

What is the decimal equivalent of 6%?

• 0.6

• 0.06

• 6.0

• 0.006

If a population of beetles is 350 and increases by 6% in a week, what will the population be after one week?

• 360

• 350

• 356

• 371

To increase a number by 12%, which of the following multipliers should you use?

• 1.2

• 0.012

• 0.12

• 1.12

What is the result of increasing 68 by 8%?

• 70.00

• 75.00

• 73.44

• 68.08

Adriana deposits $720 in a savings account that increases by 2.5% per year. What will her balance be at the end of the year?

• $735

• $750

• $720

• $738

If the temperature of a cup of coffee decreases by 8% per minute from 200°F, what will the temperature be after one minute?

• 184°F

• 200°F

• 192°F

• 180°F

What is the remaining percentage if a value decreases by 5%?

• 85%

• 90%

• 5%

• 95%

If the population of a school is 2300 and decreases by 5% in a year, what will the population be next year?

• 2150

• 2200

• 2300

• 2185

What is the result of decreasing $22.50 by 8%?

• $21.00

• $22.00

• $20.70

• $19.50

If the cost of gasoline decreases by 4.5% from $3.80 per gallon, what is the new price?

• $3.80

• $3.50

• $3.70

• $3.63