Each column is a number of requests by month, so I would like to mark the values that 15% bigger, then in a previous month. (rows are "query name" and not important)
I made a custom formula: =C2>1,15*B2 for the range B2:T and some marks are confusing me. For example, why M2 cell is not marked its 26,5% bigger then L2. Also what's wrong with F2, its smaller then E2, why its marked? Is there some mistake with cell picked for comparison in custom formula?
Change the range setting to C2:T
since your custom formula is =C2>1,15*B2