Reading Content Mathematics Many Changes Design a Sign Save Supermarket is planning a super sale They want to design a sale sign showing the produce prices Ms Vander gives these discounts Grapes Were $3.20/kg Now 25% off Granny Smith Apples Were $2.89/kg Now 20% off Red Delicious Apples Were $2.40/kg Now 15% off Are these good sales for customers? The employees brainstorm about what to write on the sale signs GRAPES Were $3.20 per Kg Now 25% off $3.20 25% off 0% Reading Strategy Read with a Purpose Think about your purpose for reading How did it affect the questions you asked yourself about the text? 288 Unit • Chapter 100% Bert sketched this sign for grapes He used a percent discount and a percent bar to visually show the relationship between the original price and the discount price Sketch signs for Granny Smith and Red Delicious apples using Bert’s suggestions Janice proposes that they include fractions instead of percents She believes customers can estimate the discounts more easily if they use fractions a Reflect Do you agree with Janice? Defend your position b Draw one sign using Janice’s suggestion Ms Vander is in favor of displaying the discount in dollars Pedro thinks it will be easier for customers if only the new price appears on the signs What kind of sign you prefer? Why? Grapes Were $3.20/kg Now 25% off The employees decide to combine ideas They will use a percent bar, the percent discount, and both the original price and the sale price on each sign Use their ideas to design new signs for each of the items on the left Granny Smith Apples Were $2.89/kg Now 20% off Red Delicious Apples Were $2.40/kg Now 15% off Pedro studies the new grapes sign and says, “This is great! You can tell just by looking at the sign what fraction or percent the customers will have to pay You can check the sale price by doing one simple multiplication.” GRAPES Were $3.20 per Kg Now 25% off $2.40 $3.20 25% off 0% Now $2.40 per kg 100% a What fraction and percent of the original price customers have to pay for grapes? b What multiplication can customers use to check the sale price for grapes? c Compute the new prices for the Granny Smith and Red Delicious apples using only one multiplication for each Reading Strategy Read with a Purpose How did your purpose for reading affect the information you focused on or didn’t focus on? ✓ Reading Check Recall details What items is Save Supermarket putting on sale? Interpret What does a percent bar show? Unit • Chapter 289 Reading Strategy Read with a Purpose What prior knowledge did you use as you read this page? How would your answer be different if your purpose for reading were to learn about sales instead of math? The Importance of Understanding Percentages Understanding the concept of percentages is important to both buyers and sellers It allows sellers to determine how much of a discount to provide and how to display the discount It allows buyers to compare the regular price to the discount price and figure out how much money they can save APPLES Were $2.89/kg Now 20% off STRAWBERRIES Were $3.30/kg Now 15% off Use what you learned about percent changes to calculate the sale price of apples and strawberries Then create a percent bar for each 290 Unit • Chapter ... $2.89/kg Now 20% off STRAWBERRIES Were $3.30/kg Now 15% off Use what you learned about percent changes to calculate the sale price of apples and strawberries Then create a percent bar for each