In this spreadsheet, I am trying to figure out ...

how many rows labeled zero are less than 43%.
How many rows labeled one are less than 43%.
How many rows labeled two are less than 43% etc ....

the formula works for all numbers except zero. It wants to count blank rows
as zero and adding them to my total. How do I get this formula to recognize
the zero for a zero and blank for a blank?

=SUMPRODUCT((E16:E4500<43%)*(F16:F4500=0))

(In my real spreadsheet rows 3417 through 4500 are blank)

Sample:

A B C D E F G
1 45% 0
2 68% 1
3 22% 0
4 19% 2
5 14% 2
6 47% 0
7 86% 1
8 -2% 0
9 62% 1
10
11
12