6-3 (B) Percent of Change

Percent of Change A ratio that compares the change in quantity to the original amount. Amount of change original amount Percent of increase – when the new amount is greater than the original. Percent of decrease – when the new amount is less than the original

Find the percent of change Amount of change original amount Round to the nearest tenth if necessary. 1.original: 20 new: 23 2.original: 50 new: 67

Amount of change original amount 3.original: 10 new: 6 4.original: 80 new: 55

Carmen had 20 comic books. She gave some to her friend. Now she has 13 comic books. Find the percent of change. State whether the percent of change is an increase or decrease.

Markup A store sells an item for more than it paid for the item. The extra money is used to cover the expense and to make a profit. The increase in the price is a markup. The percent of markup is a percent of increase. Selling Price: the amount a customer pays.

Find the selling price for each item given the cost to the store and markup. a.Roller blades: $60 Markup: 35% b. Coat: $87 markup: 33 1/3 %

Discount The amount by which a regular price is reduced. The percent of discount is a percent of decrease. a.Find the amount of discount. b.Subtract it form the price Find the sale price to the nearest cent. 1. CD: $14.50, 10% off

Find the sale price to the nearest cent. 1. CD: $14.50, 10% off 2. sweater: $39.95, 25% off

Find the discount rate on a $24 watch that regularly sells for $32. Find the markup rate on a $230 game system that sells for $345.