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Formula for calculation

Dear All

I have External Hard Drive not listed in Windows 7 backup wizard Tech Support the data of ColA only.
I would like to have a formula in ColB for  Ranks (not percentile; highest first then the second highest etc., with same rank for same mark) and I need percentile ranks in ColC using the given formula below.
Both ColB jghdtei89s & Col C should
be auto generated even if ColA is not sorted for highest to smallest.


90    1   100%

60    2    67%
 
32    3    36%

30    4    33%

30    4    33%

28    5    31%

28    5    31%

28    5    31%


To find the percentile rank of a score, x, out of a set of n How to Resolve - Excel has quit displaying charts.? scores, where Troubleshoot:External Hard Drive not listed in Windows 7 backup wizard Error
x is included:

(B + 0.5 E) *(100/n) = Percentile Rank

Where B = number of scores below x
           E = number of scores equal to x
           n = number of scores

Please help me.


Thanks
Jee

Anwsers to the Problem Formula for calculation


Let's say your data are in A1:A8.
 
In B1 as an array formula, confirmed with Ctrl+Shift+Enter:
 
=SUM(IF($A1<$A$1:$A$8,1/COUNTIF($A$1:$A$8,$A$1:$A$8)))+1
 
In C1, as an 'ordinary' formula:
 
=(COUNTIF($A$1:$A$8,"<"&$A1)+COUNTIF($A$1:$A$8,$A1)/2)/COUNT($A$1:$A$8)
 
Format C1 as a percentage.
 
Select B1:C1, then use the fill handle How to Fix Error - Dell Laptop Code 39? in the lower right corner of C1 to Solution to Problem: Referencing data in another file
fill down to row 8.


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