Can someone please explain me why the answer 8600 is wrong?

What do you think the question is asking?

Percentiles means group of 100s

So, in case of 20,000 numbers, there would be 200 groups of 100s.

Basically 200 numbers in each percentile.

1st 200 numbers would be in 0th percentile, that way till 44th percentile there would be 43*200 numbers

Please correct me wherever I am wrong.

The question does not ask “till”.

Ohhhhhh, thank you!