Percentages in everyday life

Percents.  Means “per 100”.  Percents can be written as fractions by placing the number over 100 and simplifying.

 

Percents.   Percents can be written as decimals (1) moving the 
decimal point 2 places to the left, and (2) deleting the percent sign.

 

Percent formula








Example: 4% of 50 is____ 






or      50 x 4% = 50 X 0.04 = 2

Example:         10% of X is 15,   find X

X*10%=15
 
X=15/10% = 15/0.10=150
Percent of change
 

 

 


Percentage change between two numbers A & B can be calculated
 as:
(B-A)/A * 100

For example, if a game price increases in value from $10 to $12 
the percentage increase is: 

(12-10)/10 * 100 = 2/10 *100 = 0.2*100 = 20 percent 

Alternatively, if a game price decreases in value from $10 to $9 the
percentage decrease is: 

(10-9)/10 * 100 = 0.1*100 = 10 percent


Convert Fractions, Decimals, Percents

                                                                                 Move the decimal point twice to the right
Move the decimal point twice to the left, 
delete the percent sign
Write down the decimal divided by 1
Multiply its numerator and denominator
by the same  number (10, 100, 1000, ..)
Simplify if necessary
 
 
 



To convert a decimal to a percent, multiply the decimal by 100,  then add the % symbol.

Percents

PE03Percent_of_a_Number

PE04Percent_Problems

PE06Estimation

PE13Percent_Distance_Word Problems

FR16Fraction_to_Percent

FR17Convert Fraction Decimal Percent

FR18Percent_to_Fraction

DE09Decimal_to_Percent

DE13Convert Decimal Percent Fraction

FR16Fraction_to_Percent

FR17Convert Fraction Decimal Percent

FR18Percent_to_Fraction

PE14Percent_to_Decimal

PE16Convert Percent Decimal Fraction

 

Ratios and Proportions

PP08Percents_and_Proportions

PP09Percent_Proportion

Interest

PE07Tax

PE08Price_with_Tax

PE09Markup

PE10Simple_Interest

PE11Commission

PE12Tips

Convert Decimals, Fractions And Percent (Help)

Percent Formulas (Help)

Percent (Help)

The Proportion_Method_(Help)

Percent Vocabulary