Percents Concepts

 

Objectives:

 

·        To learn the meaning of percents

·        To learn fraction, decimal and percent conversions

·        To identify the numbers in a percent problem

·        To learn a process to solve percent problems using proportions

·        To practice solving percent interest problems

·        To practice solving percent word problems

 

Outcomes:

 

·        To complete a mastery test on percents.

 

Warm-Up:

 

There are three numbers in every percent problem.  These are often given different names. 

The “total” is also known as the “base” or the “original amount”. 

The “rate” is also known as the “percent” or the “percentage”. 

The “part” is the third number.

 

1.      Check your understanding of percents, click here http://www.onlinecollegeprep.com/InteractiveArith/A12/A12Prev/A12Preview.html and complete the Chapter 12 Preview.  At this point you need to make a decision about your understanding of chapter 12 and proceed accordingly using the choices shown below.

 

2.      Writing fractions or decimals as percents; and writing percents as decimals or fractions worksheet, click here http://www.mathgoodies.com/worksheets/percent_wks.html

Answers, click here http://www.mathgoodies.com/worksheets/percent_wks_ans.html .

 

3.      Quiz on finding a percent of a quantity, click here http://www.glencoe.com/sec/math/studytools/cgi-bin/msgQuiz.php4?isbn=1-57039-850-X&chapter=4&lesson=2 .

 

New Instruction:

Meaning of Percents

 

1.      For an outline on percents, click here http://highered.mcgraw-hill.com/sites/0809222329/student_view0/chapter6/chapter_outline.html

 

2.      Meaning of percents more instruction, click here http://www.mathgoodies.com/lessons/vol4/meaning_percent.html .

 

Decimal, Fraction, Percent Conversions

 

3.      Converting percentages to fractions or decimals instruction, click here http://www.sosmath.com/algebra/fraction/frac7/frac7.html .

 

4.      Converting complex fractions to simple fractions instruction, click here http://www.sosmath.com/algebra/fraction/frac4/frac41/frac41.html.

 

5.      Converting between fractions, decimals and percents by finding the missing value, a challenge exercise, click here http://www.mathgoodies.com/lessons/vol4/challenge_vol4.html .

 

Percent Statements

 

There are three numbers in every percent problem.  These are often given different names. 

The “total” is also known as the “base” or the “original amount” or the denominator.

The “rate” is also known as the “percent” or the “percentage”, or “per one hundred”.  

The “part” is the third quantity or the numerator. 

 

6.   Percent problems instruction, click here http://www.purplemath.com/modules/percntof.htm .

 

7.     Increase-Decrease or Markup-Markdown instruction, click here http://www.purplemath.com/modules/percntof2.htm .

8.  Calculating percents, converting, and using percents, click here http://www.aaamath.com/B/pct.htm .

Feedback and Review:

Meaning of Percent

 

1.      Estimating the percent shaded of various rectangular shapes in a timed game, click here http://www.scweb4free.com/percent1.html .  Can you get 8 points out of 10 consecutive exercise attempts?  This is a great practice in visualizing different percentages.

 

Decimal, Fraction, Percent Conversions

 

2.      Percent, decimal, fraction table to complete, click here http://math.donnayoung.org/m01/drill/pr1.pdf .              

        Answers can be found here http://math.donnayoung.org/m01/drill/pr12a.pdf .

3.      More challenging percent, decimal and fraction table to complete, click here http://math.donnayoung.org/m01/drill/pr5.pdf .

        Answers can be found here http://math.donnayoung.org/m01/drill/pr3.pdf .

Percent Statements

 

4.      Mixture of percent statements to solve, click here http://www.edhelper.com/math/percents9.htm.

 

5.      Problems determining each percent of change, click here http://www.edhelper.com/math/percents10.htm .

 

6.      Finding the missing number in simple interest problems practice, click here http://www.edhelper.com/math/percents11.htm .

 

7.  Finding the missing number in more complex simple interest problems practice, click here http://www.edhelper.com/math/percents12.htm .

 

8. Game determining the Penguin Waiter Tip, click here http://www.funbrain.com/cgi-bin/pw.cgi?A1=s&A2=3&INSTRUCTS=1 .

Transfer of Knowledge or Skills:

 

1.      Quiz on using percents, click here http://www.glencoe.com/sec/math/studytools/cgi-bin/msgQuiz.php4?isbn=1-57039-850-X&chapter=4&lesson=1 .

 

2.      Comparisons between fractions, percents and decimals to check on your mastery, click here http://www.edhelper.com/math/math_seventh_grade_SEVEN63.htm .

 

3.      Finding the percent of a number to check on your mastery, click here http://www.mathbuilder.com/cgi-bin/m.cgi?FT=1&F=FIVE85 .

 

4.      Mastery of all the percent concepts, click here http://www.onlinecollegeprep.com/InteractiveArith/A12/A12Mast/A12Mast.html .

 

5.      Understanding all the percents concepts in another test, click here http://www.edhelper.com/math/percents90.htm .

 

6.  For an on-line quiz covering Percents, click here http://highered.mcgraw-hill.com/sites/0809222329/student_view0/chapter6/chapter_review_quiz.html .

 

7.  For a quiz on GED practice percent problems, click here http://highered.mcgraw-hill.com/sites/0809222329/student_view0/chapter6/ged_practice_quiz.html .

 

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