What expression has a value of 2/3

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?