I don't know the source of the claim in the referenced Forbes article, but in my recollection the claim that 8 out of 10 businesses fail applied to restaurants

I don't know the source of the claim in the referenced Forbes article, but in my recollection the claim that 8 out of 10 businesses fail applied to restaurants – tho even a a cursory review of Google search results related to that don't seem to support it particularly strongly.