If Grant is currently 25 years old, he will be 25+5 = <<25+5=30>>30 years old in five years.
If 2/3 represents Grant's age in five years, then the fraction representing the number of years the hospital is older than Grant is 1-2/3 = 1/3
If 2/3 represents 30 years, 3/3, which is the fraction representing the age of the hospital, represents 3/3*30*3/2 = 45 years.
Currently, the hospital is 45-5 = <<45-5=40>>40 years old.
#### 40