Math 5-7: Percent of Change

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Presentation transcript:

Math 5-7: Percent of Change Objective: How to find and use the percent of increase or decrease.

Vocabulary percent of change – a ratio that compares the change in a quantity to the original amount percent of increase – the percent of change when the new amount is greater than the original percent of decrease – the percent of change when the new amount is less than the original markup – the amount the price of an item is increased above the price the store paid for the item

Vocabulary selling price – the amount the customer pays for an item discount – the amount by which a regular price is reduced

Percent of Change find the amount of the change (subtract original and new) find the ratio of that amount to the original amount express it as a percent

Percent of Change original: 10 new: 6 (amount of change: 4)

Find the Selling Price Method 1: find the amount of the markup, then add Method 2: find the total percent

Find the Selling Price suit: $200, 50% markup

Find the Sale Price Method 1: find the amount of the discount, then subtract Method 2: find the total percent

Find the Sale Price shoes: $70, 10% discount

Examples diamond ring: $470, 35% markup sofa: $750, 35% off

Assignment Pg. 239 (12-28e) Chapter 5 TEST – 11/17