The daily exchange rates for the five year period 2003 to 2008 between currency A and currency B are well modeled by the normal distribution with mean1.266 in currency A (to currency B) and standard deviation 0.013 in currency A. Given this model, and using the 68-95-99.7 rule:
Determine the probability that on the randomly selected day throughout this period the unit of currency B was worth less than 1.253 units of currency A? (In percentage)