if 9 is 100 % , how many per cent is 7.2 ?

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1 Answer

 

(7.2)   (x)
----- = -----
(9)     (100)
 
(+ 9 )(+ x )=(+ 100 )(+ 7.2 )
 
+ 9x =(+ 100 )(+ 7.2 )
 
+ 9x =+ 720 
 
+ 9x =+ 720 
----- ------
+ 9   + 9   
 
+ x =+ 80 
by Level 1 User (380 points)

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