42 out of 90 is what percentage?

Plz heeeeeeelp plz give me the answer

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.