Shares of the species

You will write functions for the share of the species that is known, for the number of times one count is larger than another, and for the least number of insects.

The idea. The share known is the described species divided by the total, times $100$. A ratio divides the larger count by the smaller. The least number of insects is the described species times the share of animals times the share of insects.

Your tasks.

1. Finish share_known. It gives the per cent of the species that is described.
2. Finish times_as_many. It gives how many times as many species the first place has as the second.
3. Finish insects_at_least. It gives the number of insect species from the three numbers.