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%.

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How do you calculate the percentage decrease?

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To calculate percentage decrease, use the formula: ((Original Value - New Value) / Original Value) x 100%.

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How do you calculate the percentage increase?

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To calculate percentage increase, use the formula: ((New Value - Original Value) / Original Value) x 100%.

Front

If a product's price decreases from $50 to $30, what is the percentage decrease?

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Percentage Decrease = ((50 - 30) / 50) x 100% = 40%.

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If a product's price increases from $20 to $30, what is the percentage increase?

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Percentage Increase = ((30 - 20) / 20) x 100% = 50%.

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What is the formula for finding the final price after a discount?

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Final Price = Original Price - (Original Price x Discount Rate).

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If a toaster oven costs $68 and is on sale for 30% off, what is the discount amount?

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Discount Amount = 68 x 0.30 = $20.40.

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What is the total price of an item after applying a discount and adding sales tax?

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Total Price = (Original Price - Discount) + Sales Tax.

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If a bill is $69 and the tip is $79.35, what percentage of the bill was the tip?

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Tip Percentage = ((79.35 - 69) / 69) x 100% = 15%.

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How do you find the percent of change when comparing two quantities?

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