PERCENTAGE INCREASE AND DECREASE Week 13

DO NOW (3 mins) PKB (Prior Knowledge Box) Topic: Percentage Increase and Decrease Misconceptions Complete this side only. List anything that you know about the above topic. 2

STANDARD- 7N.S. 1.6 Calculate the percentage of increases and decreases of a quantity.

OBJECTIVE Huskies will be able to calculate the percentage of ___________ and ____________ of a quantity

If you go to the movies for a matinee its $9. 00 for students If you go to the movies for a matinee its $9.00 for students. If you go at 10pm its $12.00, How much more do you pay at night? Why? Intro

Intro continued… Black Friday Remember Black Friday from last year. Stores will drop the prices on Friday (decrease) and then raise them back on Monday (increase). Intro continued…

Steps 1) larger # and the smaller #. 2) #(from step 1), by the __________ #. 3) decimal into a __________.

Steps

Example#1 1) What is the percent decrease on a cellphone that is marked down from $200 to $120?

Example#1 1) What is the percent decrease on a cellphone that is marked down from $200 to $120? Step 1 200 -120 80 Step 2 80 ÷200= .40 Step 3 40%

Example #2 2) The steak dinner at Denny’s is $14.00 for lunch, it becomes $20.00 at dinner. Calculate the percentage increase.

Example#3 3) What is the percent decrease on a DVD recorder that is marked down from $280 to $220?

Prior Knowledge Box (PKB) Topic: Percentage increase and decrease Misconceptions What did you think you knew but you found out was a misconception? If you didn’t have any prior knowledge, what did you learn/ review today?

Station Overview (25 mins per station) Collaborative- (P) Percentage worksheet (Bring up for a check after question #1). Direct- Real- world practice with Ms. Ahumibe.

So what does it look like on the CAHSEE?

Practice Problems 1. Simon Tech- 134 students to 130. 2. Luggage- $200 to $320. 3. Food 4 Less apples $2 a pound to $3 a pound.

Exit Slip- Percentage Increase and Decrease Name Date Period

Agenda Homework-5 word problems Bring a white board marker (DUE: P.1,3,5- Mondays and Thursday. P.2,4,6- Tuesdays and Fridays)