Lesson 8-1 Pages Percent and Estimation Lesson Check Ch 7

What you will learn! How to estimate percents by using fractions and decimals.

What you really need to know! To estimate a percent of a number, you can use a fraction or a multiple of 10% or 1%.

What you really need to know! 10% makes a number one digit smaller! 1% makes a number two digits smaller!

Example 1: Estimate 61% of % of % of 400 = 40 6 x 40 = 240

Example 2: Estimate 18% of % of % of 300 = 30 2 x 30 = 60

Example 3: Estimate 59% of % of % of 500 = 50 6 x 50 is 300

Example 4: Estimate 173% of % of x 6 10% of 60 = 6 102

Example 5: Estimate 1/3% of % of 900 1/3% is (1÷3)%, so… 1% x 900 = 9 9 ÷ 3 3

Example 6: Last season 96,081 people were in attendance at a college football game. About 0.25% of those were reporters from newspapers and television and radio stations. About how many media people were present?

0.25% of 96, % is the same as 1/4% 1% of 96,000 1% x 96,000 = ÷ 4 = 240 About 240 media people

Page 336 Guided Practice #’s 5-14

Pages with someone at home and study examples! Read:

Homework: Page 337 #’s #’s Lesson Check 8-1

Link to Lesson 8-1 Review Problems

Page 582 Lesson 8-1

Lesson Check 8-1