cumulative comparison with last year of month to date

I am wondering how to calculate a cumulative total of data up to the current date of the month in comparison of daily activity in a month to last year.
As the attached example shows, I have two columns, one for the days of the month for this year and one column with the days for last year. I need to compare the total for the days of this year with the total of the days for last year, but only up til the last day of this month which has data entered.

I could create a another column to do this but wanted to calculate it in one cell without creating another column. thanks, johnbtor

You can put this formula in D6:

=IF(B6=0,"",(B6-C6)/C6)

Format as prcentage with 2 dp, and then copy down. That will duplicate what you have manually in column D.

Then in another cell you can put this formula:

=(SUM(B$6:B36)-SUM(INDIRECT("C$6:C"&5+COUNTIF(B6:B36,">0"))))/SUM(INDIRECT("C$6:C"&5+COUNTIF(B6:B36,">0")))

which will give you the ratio for the totals up to the latest non-zero entry in column B (assuming all entries are non-zero for previous days).

Hope this helps.

Pete

this works also! thanks! Love learning about these different ways to approach these challenges. thanks again.

@ johnbtor

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Thanks.

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Just had one question. I am wondering why one needs to take -(1-Sumif). Seems that makes the answer 1 less than the desired answer?