Lesson 6-5 Pages Using the Percent Proportion Lesson Check 6-4

What you will learn! How to use the percent proportion to solve problems.

PercentPart Base

What you really need to know! In a percent proportion, one of the numbers called the part, is being compared to the whole quantity called the base. The other ratio is the percent, written as a fraction, whose base is 100.

What you really need to know!

The number after the word “of” is the base! The number near the word “is” is the part!

Example 1: Twenty is what percent of 25? 2,000 = 25p 80 = p 80%

Example 2: What percent of 8 is 12? 1,200 = 8p 150 = p 150%

Example 3: From the years 1988 through 1996 Steffi Graf won the U.S. Open tennis championship five times and Wimbledon seven times. What percent of both tournaments combined during those years was Steffi Graf the women’s champion?

1988 through 1996 is a 9 year period. Over the 9 years, that would be 18 tournaments. Steffi won 12. 1,200 = 18p 66.7 = p 66.7%

Example 4: What number is 8.8% of 20? 100n = 176 n =

Example 5: At Kington Middle School, 600 students were asked if their families recycle cans and/or newspapers. 32% said they recycle both; 25% said they recycle cans; 19% said they recycle newspapers; 24% said they do not recycle. How many families recycle both cans and newspapers?

100n = 19,200 n = families

Example 6: Seventy is 28% of what number? 28b = 7,000 b =

Page 291 Guided Practice #’s 3-8

Pages with someone at home and study examples! Read:

Homework: Pages #’s 9-23 all, 25 #’s 28-41, PQ 1 Lesson Check 6-5

Page 738 Lesson 6-5

Lesson Check 6-5

Prepare for Mid-Test Pages #’s 6-40 even (7-39 odd-Answers in back of book)