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identify the percent of change as an increase or a decrease. Then find the percent of change.

 

Question 1  84 increased by 12%

 

Question 2  820 decreased by 25%

Nerd123  Jan 30, 2018
 #1
avatar+89852 
+2

 

Well....by the use of the word "increase" or "decrease" in the questions themselves, we should be able to  answer the first  part

 

Here's 1

 

Note something important   we can write an  "x"  percent increase  as

 

(1  +  the decimal representation of the percent increase )

 

So......this becomes

 

84  ( 1 + 12%)  =  84 ( 1 + .12)  =  84 ( 1.12)  =  94.08

 

Here's 2

 

Likewise.....we can write an "x" percent decrease  as

 

(1 -  the decimal representation of that decrease )

 

So we have

 

820 ( 1 - 25% )  =  820 ( 1 - .25)  =  820 (.75)  = 615

 

 

cool cool cool

CPhill  Jan 30, 2018
 #2
avatar+229 
+1

thanks Cphill

Nerd123  Jan 30, 2018

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