Answer:
We reject H₀  the actual percentage of type A donations differs from 40%
Step-by-step explanation:
Sample information:
sample size   n = 146
Type A   x₁  =  81   and   p₁  = 81 / 146     p₁  =  0,5547
then  q₁   =  1 - p₁    q₁  =  1  -  0,5547    q₁  =  0,4453
We choose as significance level  α  = 5%  α = 0,05   α /2  = 0,025
from z-table we find   z (c) = 1,96
National % of the population  ( μ  = 40 %  μ = 0,4 )
Test hypothesis
Null hypothesis                           H₀           p₁  =  μ
Alternative Hypothesis              Hₐ           p₁   ≠ μ
The Alternative hypothesis indicates that the test is a two-tail test
z(s) =  ( p₁  -   μ )/ √ p₁*q₁ / n
z(s) =  ( 0,5547  -  0,40 )/ √ 0,5547*0,4453 / 146
z(s) =  0,1547 / 0,041
z(s) = 3,77
Comparing  z(s)  and z(c)
z(s) > z(c)  
z(s) is in the rejection region. We reject H₀. Sample does not give evidence to support that the actual percentage of type A donations is equal to the national population