Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a way to express how much a quantity has increased or decreased in relation to its original amount, calculated as (New Value - Original Value) / Original Value x 100%.

Front

How do you calculate Percent of Change?

Back

To calculate Percent of Change, use the formula: Percent of Change = ((New Value - Original Value) / Original Value) x 100%.

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If a pair of jeans costs $30 and is on sale for $15, what is the percent of change?

Back

25% decrease.

Front

Miguel read 15 books in 6th grade and 21 books in 7th grade. What is the percent change in the number of books he read?

Back

40% increase.

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What is the percent change if the average healing time changes from 8 weeks to 3 weeks?

Back

62.5% decrease.

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Erika decreased her salt intake from 5,000 mg to 2,000 mg. What is the percent decrease?

Back

60% decrease.

Front

If the number of dogs decreases from 20 to 5, what is the percent change?

Back

75% decrease.

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What does a positive percent change indicate?

Back

A positive percent change indicates an increase in the quantity.

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What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in the quantity.

Front

If a product's price increases from $50 to $75, what is the percent of change?

Back

50% increase.