31
Jan

Need excel formula for calculating the column c = log(100/column b)


Answer:
in box C2 type:

=Log(100/B2,10)

the 10 means log base 10.

copy and paste as far down as need it, making sure B3 is row 3 and so on. Excel should take care of this automatically.


Answer:
You almost have it. In cell C2 type:

=log(100/B2,10)

Then enter a number in B2 and it calculates your forumula using Base 10 (that's the ",10" at the end of the formula)

Returns the logarithm of a number to the base you specify

LOG(number,base)

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