A pharmaceutical company conducted a study to evaluate the effect of an allergy relief medicine; 268 patients with symptoms that included itchy eyes and a skin rash received the new drug. The results of the study are as follows: 85 of the patients treated experienced eye relief, 131 had their skin rash clear up, and 72 experienced relief of both itchy eyes and the skin rash. What is the probability that a patient who takes the drug will experience relief of at least one of the two symptoms? If required, round your answer to two decimal places.

Let E	=	event patient treated experienced eye relief.
S	=	event patient treated had skin rash clear up.

Probability = fill in the blank 1