Percent Increase and Decrease

Front

What is Percent Increase?

Back

Percent Increase is the amount that a value has increased, expressed as a percentage of the original value. It is calculated using the formula: ((New Amount - Original Amount) / Original Amount) x 100.

Front

What is Percent Decrease?

Back

Percent Decrease is the amount that a value has decreased, expressed as a percentage of the original value. It is calculated using the formula: ((Original Amount - New Amount) / Original Amount) x 100.

Front

How do you calculate the Amount of Change?

Back

The Amount of Change is calculated by subtracting the original amount from the new amount: Amount of Change = New Amount - Original Amount.

Front

What is the formula to find the New Amount after a Percent Increase?

Back

New Amount = Original Amount + (Original Amount x Percent Increase).

Front

What is the formula to find the New Amount after a Percent Decrease?

Back

New Amount = Original Amount - (Original Amount x Percent Decrease).

Front

If you have an original amount of 100 and a 10% increase, what is the new amount?

Back

New Amount = 100 + (100 x 0.10) = 110.

Front

If you have an original amount of 200 and a 15% decrease, what is the new amount?

Back

New Amount = 200 - (200 x 0.15) = 170.

Front

How do you find the difference between the original and new amount?

Back

Subtract the smaller number from the larger number: Difference = New Amount - Original Amount.

Front

What is a practical example of calculating a tip?

Back

If your meal costs $50 and you want to leave a 20% tip, calculate: Tip = 50 x 0.20 = $10.

Front

How do you calculate sales tax on an item?

Back

Sales Tax = Price of Item x Tax Rate. For example, for a $100 item with a 5% tax rate: Tax = 100 x 0.05 = $5.