Percentage Change and Growth Problems

This video tutorial explains how to calculate percentage change using a simple formula: percentage change equals the change divided by the original value, multiplied by 100. It provides three examples: a car price decrease, plant growth, and a cat's weight increase, demonstrating how to apply the formula in each scenario. The video concludes with a reminder that a percentage over 100 indicates more than doubling and encourages viewers to like and subscribe.

What is the formula for calculating percentage change?

• Change divided by original times 100

• Original divided by change times 100

• Change plus original times 100

• Original minus change times 100

If a car's price drops from £32,000 to £28,000, what is the percentage decrease?

• 12.5%

• 10%

• 15%

• 8%

In the car price example, what is the original price?

• £32,000

• £36,000

• £28,000

• £4,000

How can you represent a decrease in percentage change using negative values?

• By using a negative sign before the change

• By using a positive sign before the change

• By multiplying the change by 100

• By dividing the change by 100

What is the percentage increase if a plant grows from 1.2 meters to 1.8 meters?

• 70%

• 60%

• 50%

• 40%

In the plant growth example, what is the original height?

• 2.0 meters

• 0.6 meters

• 1.8 meters

• 1.2 meters

What is the change in height for the plant growth example?

• 0.8 meters

• 0.6 meters

• 1.2 meters

• 1.8 meters

If a cat's weight increases from 0.7 kilos to 1.8 kilos, what is the percentage increase?

• 157%

• 100%

• 200%

• 50%

In the cat weight example, what is the original weight?

• 0.7 kilos

• 1.8 kilos

• 2.0 kilos

• 1.1 kilos

What is the change in weight for the cat weight example?

• 1.1 kilos

• 0.7 kilos

• 1.8 kilos

• 0.5 kilos