If you're being sarcastic.... His math is actually pretty much correct. In total you need 10,454,400,000 experience from paragon 0 to 100, at paragon level 75 you have 4,741,200,000 experience. That's 45.3% of the way to paragon 100 in terms of total experience. Level 78 is pretty much half way at 49.8% experience. Here's a pie chart that displays this, who doesn't like pies
Also if one were to play 3 hours a day, farming a decent rate of 50mil/hour it would take them roughly 70 days to hit paragon 100. Having a paragon 100 myself 18 hours a day is way overkill.
Edit: sorry didn't see other posts that got posted while I was replying. Oh well more information I guess.