Increasing and Decreasing Percentages
A Grade 8 math worksheet focusing on calculating percentage increases and decreases, and applying these concepts to real-world problems.
Includes
Standards
Topics
Increasing and Decreasing Percentages
Name:
Date:
Score:
Read each question carefully and calculate the percentage increase or decrease. Show your work where applicable.
1. To find a percentage increase, you first find the amount of increase, then divide by the amount and multiply by 100.
2. When a quantity decreases, the new amount will be than the original amount.
3. A discount is an example of a percentage .
1. A shirt that originally cost $25 is now on sale for $20. What is the percentage decrease in price?
5%
20%
25%
80%
2. A population of bacteria increased from 200 to 250 in one hour. What is the percentage increase?
20%
25%
50%
125%
1. The price of a gallon of gas increased from $3.00 to $3.60. What is the percentage increase?
2. A store is having a 30% off sale. If a jacket originally costs $90, what is the new price after the discount?
1. If a value increases by 10%, and then decreases by 10%, it will return to its original value.
True
False
2. To calculate a 15% increase on a number, you can multiply the number by 1.15.
True
False
A car's value depreciates by 15% each year. If a car is bought for $20,000, what will its value be after 2 years?