Mrs. Disponzio's Math Website



Aim: How do we calculate percent increase and decrease?Warm up: How do you convert a decimal into a percent?Homework:NOTES: Percent Increase: a percent change in which something ____________ in value.Percent Decrease: a percent change in which something ____________ value. Original: what you _______________ with. Formula: Difference Orginial * 100 Problem 1: Martha’s bakery started with 100 cupcakes in the morning. After a busy afternoon there are only 20 cupcakes left. By what percent did the cupcake inventory drop?Problem 2: The price of a shirt dropped from 20 to 10 dollars. By what percent did the price drop?Problem 3: The enrollment at IS 73 increased from 1,500 students to 2,000 students over a 2-year period. What is the percent increase in enrollment?Problem 1: The enrollment at a university increased from 14,000 students to 16,000 students over a 5-year period. What is the percent increase in enrollment?Problem 2: The attendance at a local football game went down from 2000 people to 1500 people. What was the percent decrease in attendance?Problem 3: Cars depreciate at different rates depending on the model and the year purchased. Peter is looking to sell his jeep. He bought his jeep for $30,000 after a year of depreciation the current value is $20,000. What was the percent decrease in the jeep’s value?Problem 4: The selling price of a home went from $200,000 to $190,000. By what percent did the price drop?Problem 5: Foot Locker at the Queens Center Mall had a profit of $93,570 in 2012. Since the economy turned around Foot Locker’s sales increased to $149,765 in 2013. Calculate the percent increased from 2012 to 2013?Challenge: All Macy’s Jewelry stores mark up prices to maximize profits. The following are the list of items carried in their jewelry stores. Item Wholesale PriceRetail PricePercent IncreaseRing$60$90Necklace$120$240Bracelet$40$ 100Calculate the percent increase of each item at Macy’s jewelry store. 4000500439356500WORK TIME: ALL WORK DONE ON LOOSELEAF ................
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