Probability:

In a certain town there are only two brands of hamburgers available,Brand A and Brand B. It is known that people who eat Brand A hamburger have a 30% probability of suffering stomach pain and those who eat Brand B hamburger have a 25% probability of suffering stomach pain. Twice as many people eat Brand B compared to Brand A hamburgers. However, no one eats both varieties. Supposing one day you meet someone suffering from stomach pain who has just eaten a hamburger, what is the probability that they have eaten Brand A and what is the probability that they have eaten, Brand B? Answer needs to be an decimal.