A company that sells frozen pizzas is running a promotional special. Out of the next 100,000 boxes of pizza produced, randomly chosen boxes will be prize winners. There will be one grand prize winner who will receive $100,000. Five hundred first prize winners will get $1000, and 3,000 second prize winners will get a free pizza. What is the probability that the pizza you just bought will be the grand prize winner? Express your answer as a decimal and a percent.