Human beings have described many of the animals they have encountered on earth. Roughly what portion of the animals that have been described are insects?

Eighty percent

Explanation:

Insects have jointed legs, segmented bodies and exoskeletons. Insects are most documented and recognized species on earth. They are also the most diverse group of organism. There are around 900 thousand of insects living on Earth, it is almost eighty percent of all the known species.  Insects belong to the class of phylum Arthropoda

The process that occurs before hypothesis is Identifying the variables.