Excel formula assistance

[FONT=&quot]I am planning to derive an answer in percentage in excel by using excel formula. Basically, I am trying to select a specific number from a cell, then add that specific number and then divide to get percentage.[/FONT]
[FONT=&quot]For example -[/FONT]
[FONT=&quot]In the excel sheet from total 5 cells - if Cell A1 has 100, Cell A2 has 100, Cell A5 has 100 - then select those 3 numbers from A1, A2, A5 and add them (100 + 100 + 100 = 300) then divide 5 and take that answer as percentage & in this case - 300 / 5 = 60[/FONT]
[FONT=&quot]Can you share a formula by using select or another manner. Thank for your assistance.[/FONT]

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Thank you AliGW. I had to post in that forum as initially, I couldnt find an option to post a new question. Hence I posted in another forum. But =SUMIF(P712,H15,P712)/5/100 formula helped me. I will close this post.

By the way, I was trying to close this question, I am not sure if I am seeing in the right spot, I dont see an option to close it. May be you can let me know please.

There is no way to mark a thread as solved here - sorry.

Please just take note of the rules here and on the other forum and follow them. Thank you.