As per BBC, 80% Indians surviving on 20 rupees/day
http://news.bbc.co.uk/2/hi/south_asia/6946800.stm
India's GDP per capita works out to be about 145 INR/day, so it's plausible that the 80'th percentile would be 33% higher than that. It's a little unlikely that the 80'th percentile would be 1/7 of that.
I'm reminding you again, the discussion here is about progression of India from its own past but you're either coming up with figures for some particular year or some senseless comparison with other countries. In other words, you're simply trolling.
http://ibnlive.in.com/news/836-million-indians-live-on-less-...