heyy guys,
Am sure everyone is gearing up for the C day. I am in a lil bit of trouble with my speed in DI ( Know its a bit too late

). i remember to have mastered some techiques of faster division of large numbers for qns like ( which one has the highest percentage increase? etc. It will be a great help if ppl cud suggest me some shortcuts.. i did browse thru pagalguy but cudnt find appropriate material.. PLease help..