I just need to know a formula, please

The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths Passenger car occupant 13, 100 Motorcycle driver 4,500 Tornado 553 Skydiving 56 d) What is the probability that an American chosen at random will die as the result of a tornado next year? Make sure your answer is accurate to at least 2 significant figures (values after leading zeros)