Respuesta :

40 is the answer hope it's what you need
soooobored
30 people out of a total of "x" watched for 1 hour

this is 75% of the total group
so 75% of x must equal 30

x*0.75 = 30

divide 0.75 to both sides

x= 30/0.75= 30/3 *4=...