Example 1: Real-World Example Example 2: Real-World Example Main Idea Example 1: Real-World Example Example 2: Real-World Example Example 3: Percents Greater Than 100 or Less Than 1 Example 4: Percents Greater Than 100 or Less Than 1 Example 5: Real-World Example Lesson Menu

Estimate percents by using fractions and decimals. Main Idea/Vocabulary

Answer: So, about 264 senior citizens bought tickets for the concert. CONCERTS A town sold 440 tickets to a chamber music concert in the town square. Of the tickets sold, 61% were discounted for senior citizens. About how many senior citizens bought tickets for the concert? 61% of 440  60% of 440 61%  60%  264 Multiply. Answer: So, about 264 senior citizens bought tickets for the concert. Example 1

BAKE SALE A high school held a bake sale and sold 500 cookies BAKE SALE A high school held a bake sale and sold 500 cookies. Of the cookies sold, 29% were chocolate chip. About how many chocolate chip cookies were sold? A. about 460 cookies B. about 165 cookies C. about 150 cookies D. about 15 cookies Example 1 CYP

Method 1 Use a fraction to estimate. COINS Melinda calculated that 40% of the coins in her coin collection were minted before 1964. If there are 715 coins in her collection, about how many of them were minted before 1964? Method 1 Use a fraction to estimate. and round 715 to 700 ≈ 280 Multiply. Example 2

Method 2 Use 10% of a number to estimate. Step 1 Find 10% of 700. = 70 Step 2 Multiply. 40% of 700 is 4 times 10% of 700. 4  70 = 280 To multiply by 10%, move the decimal point one place to the left. Answer: So, about 280 of the coins were minted before 1964. Example 2

FLOWERS About 60% of the flowers Bonnie planted in her garden are daisies. If she planted 62 flowers, approximately how many of them are daisies? A. 32 daisies B. 36 daisies C. 40 daisies D. 42 daisies Example 2 CYP

Percents Greater Than 100 or Less Than 1 Estimate 173% of 60. 173% is about 175%. 175% of 60 = (100% of 60) + (75% of 60) 175% = 100% + 75% = (1 60) + 100% = 1 and 75% = = 60 + 45 or 105 Simplify. Answer: So, 173% of 60 is about 105. Example 3

Estimate 126% of 200. A. 325 B. 250 C. 128 D. 74 Example 3 CYP

Percents Greater Than 100 or Less Than 1 Estimate % of 898. % is one third of 1%. 898 is about 900. 1% of 900 = 0.01  900 Write 1% as 0.01. = 9 To multiply by 1%, move the decimal point two places to the left. One third of 9 is  9 or 3. Answer: So, % of 898 is about 3. Example 4

Estimate % of 980. A. 20 B. 10 C. 5 D. 2 Example 4 CYP

Answer: There were about 240 reporters at the game. GAME ATTENDANCE Last weekend, 96,081 people attended a college football game. About 0.25% of them were reporters from newspapers, television, and radio stations. About how many reporters were at the game? 0.25% is one fourth of 1%. 1% of 96,000 = 0.01  96,000 = 960 __ 1 4 So, 0.25% of 96,000 is about of 960 or 240. Answer: There were about 240 reporters at the game. Example 5

CONCERTS Last weekend, 54,012 people attended an outdoor concert CONCERTS Last weekend, 54,012 people attended an outdoor concert. About 0.10% of them were music critics. About how many music critics attended the concert? A. 540 music critics B. 54 music critics C. 10 music critics D. 5 music critics Example 5 CYP