Percentage Increase and Decrease Problems

The video tutorial covers the concepts of percent increase and decrease, demonstrating how to calculate these changes through various exercises. It includes examples such as salary increases, water volume decrease, student enrollment growth, price discounts, and changes in population and attendance. The tutorial emphasizes using the formula 'part over whole equals percent over 100' to solve these problems.

Ruth's weekly pay is $750 and it will increase by 12%. What will be her new weekly pay?

• $810

• $840

• $900

• $750

A pool initially contains 13,500 gallons of water. If the volume decreases by 23%, how many gallons remain?

• 10,395 gallons

• 9,000 gallons

• 12,000 gallons

• 11,500 gallons

Linden Middle School has 480 students, and the number is expected to increase by 5%. How many students will there be next year?

• 500 students

• 504 students

• 480 students

• 490 students

A sweater originally priced at $85 is marked down by 14%. What is the sale price?

• $72.90

• $74.00

• $73.10

• $70.00

Antonio's hourly wage is $24, and he receives a $3 raise. What percentage increase does this represent?

• 12.5%

• 15%

• 8%

• 10%

Lacey's hourly wage increased from $13 to $17. What is the percentage increase, rounded to the nearest tenth?

• 35.0%

• 25.0%

• 28.5%

• 30.8%

Gloria's car payment increased from $240 to $275. What is the percentage increase?

• 13.0%

• 15.0%

• 12.5%

• 14.6%

The population of a town decreased from 2,340 to 1,835. What is the percentage decrease?

• 19.5%

• 20.5%

• 22.0%

• 21.6%

Attendance at a baseball game increased from 458 to 605. What is the percentage increase?

• 32.1%

• 28.0%

• 30.0%

• 35.0%

Blake's credit card debt decreased from $370 to $125. What is the percentage decrease?

• 66.2%

• 64.0%

• 65.0%

• 67.5%