Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a measure that describes how much a quantity has increased or decreased in relation to its original amount, expressed as a percentage.

Front

How do you calculate Percent of Change?

Back

Percent of Change = ((New Value - Old Value) / Old Value) x 100.

Front

If a quantity increases from 50 to 75, what is the percent of change?

Back

Percent of Change = ((75 - 50) / 50) x 100 = 50%.

Front

If a quantity decreases from 200 to 150, what is the percent of change?

Back

Percent of Change = ((150 - 200) / 200) x 100 = -25% (indicating a decrease).

Front

What does a positive percent of change indicate?

Back

A positive percent of change indicates an increase in the quantity.

Front

What does a negative percent of change indicate?

Back

A negative percent of change indicates a decrease in the quantity.

Front

Find the percent of change when a price goes from $20 to $25.

Back

Percent of Change = ((25 - 20) / 20) x 100 = 25%.

Front

Find the percent of change when a population decreases from 1,000 to 800.

Back

Percent of Change = ((800 - 1000) / 1000) x 100 = -20%.

Front

If a student scores 80 on a test and then scores 90 on the next test, what is the percent of change in score?

Back

Percent of Change = ((90 - 80) / 80) x 100 = 12.5%.

Front

If a car's value decreases from $15,000 to $10,000, what is the percent of change?

Back

Percent of Change = ((10,000 - 15,000) / 15,000) x 100 = -33.33%.