how do I Divide "/" a row of cells by another row of cells?

[Guest]

I have a excel sheet that I want to divide two long rows of cell by each
other. I want to divide n6 through N20 / M6 through M20. In the N row I have
a percent and I want to divide it by Time in the M row. Please help!!

 

[Guest]

In cell O6 enter:

=N6/M6

Copy O6 from O7 thru O20

 

[Bob Phillips]

=SUM(IF(M6:M20<>"",N6:N20/M6:M20))

which is an array formula, it should be committed with Ctrl-Shift-Enter, not
just Enter.

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

 

[Guest]

the formula =SUM(IF(M6:M20<>"",N6:N20/M6:M20)) didnt work it gave me a
#value. My boss explained what he wanted better to me let me try again. I
have a row that is cells K6 through K20 that are in a time format like 2:00.
I want to divide those cells by the cells M6 through M20 which are in a
percent format. Then I want to multiply the number i get by 100 to give me a
percent. what im using this for mabe it will help if i explain? We run
machines for a 8hr period or less which we call hours worked, cells M6-M20
sometimes the machines are down or not running in those hours which we call
delay time cells K6-K20 I needed a % that the machine was down for the amount
of hours worked.

 

[Bob Phillips]

Did you array enter it like I said?

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

 

[Guest]

Yes it says not valid in merged cells but i have no merged cells in that area?