homework question:

Test the hypothesis using theP-value approach. Be sure to verify the requirements of the test.

Upper H 0 : p equals 0.58 versus Upper H 1 : p less than 0.58

H0:p=0.58versusH1:p<0.58

n= 150, x= 81 , alpha= 0.05

I know (1-p0) is is (150)(.58)(1-.58) =36.54 which is greater than or equal to 10

My question is how do i find P-value? I thought in order to find P, the equation is x/n, but i get .54. My online homework is saying P-value= 0.160

i have no idea how they got that