Estimates of all the species that have ever lived are around 5 billion (lowest estimate) if we just count eukaryotes. Orders of magnitude higher than the 8 million extant (eukaryote) species. So that means the 99% figure is massively underestimated, it's more like 99.9%
You're welcome but you really need to start doing your own research. Creationism seems to attract lazy people.
Extant species
~7.77 million species of animals (of which 953,434 have been described and cataloged)
~298,000 species of plants (of which 215,644 have been described and cataloged)
~611,000 species of fungi (moulds, mushrooms) (of which 43,271 have been described and cataloged)
~36,400 species of protozoa (single-cell organisms with animal-like behavior, eg. movement, of which 8,118 have been described and cataloged)
~27,500 species of chromista (including, eg. brown algae, diatoms, water moulds, of which 13,033 have been described and cataloged)
Total: 8.74 million eukaryote species on Earth. - Source...
It is known that almost all of the species which have lived on the Earth are now extinct (Raup 1986). Only about one in a thousand of those which have ever existed are alive today, and most of the others didn’t last very long—less than ten million years in most cases. Some of these were wiped out by well-documented cataclysmic events. The K–T boundary event is the most famous example, caused perhaps by the impact of a meteor (Alvarez et al. 1980, Sharpton et al. 1992, Glen 1994). However, the majority of extinctions have no known cause. It is possible that some of them were the result not of environmental disasters but simply of natural evolutionary processes. If a coevolutionary avalanche of sufficient size were to pass through the ecosystem, causing the evolution of thousands of species to new forms, it is conceivable that certain species would find their livelihoods destroyed by the changes, and be driven to extinction. - Source (pdf)
See How do rare species avoid extinction? A paleontological view. Author, Michael L. McKinney
See also Biological Extinction in Earth History Author, David M. Raup (pdf)