Aclient has a mean arterial blood pressure (map) of 97 mmhg and an intracranial pressure (icp) of 12 mmhg. what is the cerebral perfusion pressure (cpp) for this client? record your answer using a whole number

Cerebral perfusion pressure or CPP can be calculated by subtracting the mean arterial blood pressure with intracranial pressure(ICP). Mean arterial blood pressure(MAP) itself calculated by adding (2*systole + diastole)/3 
The cerebral perfusion pressure for this client would be:
CPP= MAP-ICP
CPP= 97mmHg- 12mmHg= 85mmHg