What is the absolute difference in the incidence rates of heart attacks for Vioxx versus Naproxen?

What is the absolute difference in the incidence rates of heart attacks for Vioxx versus Naproxen? Please calculate as events per 1000 person-years and round to the nearest tenth (e.g., x.x); do not write the units when entering your answer.

What is the absolute difference in the risk of heart attacks for Vioxx versus Naproxen? Please report as a percentage, rounded to the nearest hundredth (e.g., .xx). Do not include the % sign