Countif item is = 20% of total of range
 

I am trying to write a countif statement that will count "not sum" in a item is = 20% of the total set items.

Example Revenues:

4,186.63
21,043.25
9,574.95
1,056.00
134,111.20
30.00
35,293.72
11,555.45

The example should send back a total of 3.

The formula for this is =COUNTIF(B3:B10,"="&SUM(B3:B10)*20%)
...however as 20% of the total of the above comes to 43,370.24, this results in 1 being greater or equal to that value in your example.