My math is fine but I guess you kept your comprehension skill in your Madrassa.
Read this:
http://mckinsey.webscience.it/storage/first/uploadfile/attach/139854/file/trin07.pdf
You took the lowest estimate while others take the highest estimate.
Your post started with lampooning indian media of hyping the middle class. Yes it might be 10% of the population but with the growth of Indian economy it is the fastest growing segment of indian population. By 2015 it will overtake the poor people in India.
I guess you understand that but you dont want to admit it. I cannot fault you Janabi. i have seen you enough. You are a clever person and can twist facts to support your claims. I hope you could use your cleverness for the good of your people.