Presentation on theme: "Section 8.1 D2 Percents Math in Our World. Learning Objectives Find percent increase or decrease. Evaluate the validity of claims based on percents."— Presentation transcript:
Section 8.1 D2 Percents Math in Our World
Learning Objectives Find percent increase or decrease. Evaluate the validity of claims based on percents.
Problems Involving Percents Procedure for Finding Percent Increase or Decrease Step 1 Find the amount of the increase or the decrease. Step 2 Make a fraction as shown: Step 3 Change the fraction to a percent.
EXAMPLE 10 Finding a Percent Change A large latte at the Caffeine Connection sells at a regular price of $3.50. Today it is on sale for $3.00. Find the percent decrease in the price.
EXAMPLE 11 Recognizing Misuse of Percents in Advertising A department store advertised that certain merchandise was reduced 25%. Also, an additional 10% discount card would be given to the first 200 people who entered the store on a specific day. The advertisement then stated that this amounted to a 35% reduction in the price of an item. Is the advertiser being honest?