Percent of Change. Objective: To find the sale price of various items. To use the percent of change formula to find discount.

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Presentation transcript:

Percent of Change

Objective: To find the sale price of various items. To use the percent of change formula to find discount.

What is Percent of Change? Common Examples of Percent of Increase Common Examples of Percent of Decrease Sales tax on an item purchased Items that are on sale at a store Finding a total bill at a restaurant including tip Population decreases

Percent of Change Percent of Change: the amount, stated as a percent, that a number increases or decreases. Percent of Increase: The amount, stated as a percent, that a number goes up. Percent of Decrease: The amount, stated as a percent, that a number goes down.

Percent of Change Sales result in a percent of decrease!

Percent of Change Sale tax results in a percent of increase!

The regular price of an IPhone at the Apple store is $550. This week it is on sale for 25% off. What is the amount of the discount? Add tax. What is the total price with tax? What would the sale be if the price was $ after the sale without tax?

Item 1 $ Item 5 $ Item 4 $ Item 2 $69.58 Item 6 $ Item 3 $99.99

Item25% off + tax45% off + tax80% off + taxSale for $30.00 off What is the percent? What is the new cost with tax? (2pnts) (5 pnts) (2pnts) (5 pnts) (2pnts) (5 pnts) (2pnts) (5 pnts) (2pnts) (5 pnts) (2pnts) (5 pnts) You have $ to spend on Black Friday. Buy as many items as you can so that after taxes are added, you have > $10.00 in change. Name, copy, paste and total the items you bought without tax. (20 pnts) Calculate your total with 7.75% sales tax. (20 pnts) What is your change? (10 pnts) Show ALL your work!!! (20 pnts) Download the template to create a PowerPoint with completed calculated answers, items, total of purchase (with and without tax) totaling within $10 of your $2000 limit, and your change. Save and print your final project to share with the class. (50 pnts) Score: ________ /250 pnts

Item25% off + tax45% off + tax80% off + taxSale for $30.00 off What is the percent? What is the new cost with tax?