Problem
1) Calculate the biodiversity loss (% of Genera lost) in the Ordovician extinction
2) Calculate the biodiversity loss (% of Genera lost) in the Devonian extinction
3) Calculate the biodiversity loss (% of Genera lost) in the Triassic extinction
4) Calculate the biodiversity loss (% of Genera lost) in the Cretaceous extinction
5) Calculate the biodiversity loss (% of Genera lost) in the Permian extinction