Do Now (ConnectEd Science Pg. 709) Convert each gas to a decimal and a fraction in simplest form. 1.) Nitrogen 2.) Oxygen 3.) Trace gases 1.) /50 2.) /100 3.) 0.011/100

Do Now Replace each ______ with, or = to make a true statement. 1.) 2.) 3.) 1.) > 2.)

12/1/ B Estimate with %

Method - convert % to fraction - use compatible numbers Remember… of = multiplication

Example 1 Estimate 49% of % of 302 is about 150

Example 2 Estimate 80% of 1,605 Round 1,605 to 1,500 since it is divisible by 5. 80% of 1,605 is about 1,200.

Example 3 A CD that originally cost $11.90 is on sale for 25% off. About how much will you save by buying the CD on sale? Find equivalent ratios. You would save about $3.

Example 4 Estimate 60% of 27

Example 5 “Nearly 90 percent of Americans eat turkey every Thanksgiving.” (International Business Times 11/28/2014.) According to the most recent census, there were 316,148,990 Americans. ( About how many people ate turkey on Thanksgiving? 90% of 316,148,990 90% of 300,000,000 About 270 million people

Example 6 The Mid-Atlantic Little League Champions led the Macy’s Thanksgiving Day Parade. The pitcher Mo’ne Davis was interviewed prior to the parade starting. “…in Bristol, Conn., Davis struck out six and allowed three walks and three hits.” ( Based on this statistic, if Davis pitched to 210 batters about how many would she strike out?

50% of % of 200 About 100 batters (

Exit Ticket ALL are ESTIMATES so ABOUT: 1.) 21 2.) 80 3.) 28 4.) 6 hours

Homework Pg. 244 #1-26 Evens Ch. 4 Quiz IV = Wednesday Ch. 4 Test = Friday TenMarks “Expressing Percents” due Friday