That paper links a random blog post as source for these statistics (reference 9). That's a huge red flag for me and not what I'd expect in a scientific paper. I find the numbers wildly implausible in any case since they only have two categories: hereditary and environmental/lifestyle.

Cancer is caused by random chance. Accumulate enough mutations of the right kind and you get it. Of course you can dramatically affect that chance through genetic factors and environmental ones.