Respuesta :

Answer:

33.5%

Step-by-step explanation:

The general form of an exponential equation showing decay is;

A = I(1-r)^t

The percentage part is 1-r

Equate this to what we have in the question

1-r = 0.665

r = 1-0.665

r = 0.335

This in percentage is 33.5%