Describe how latitude and longitude coordinates are used to locate positions on earth?

First you go to where the prime meridian (0 degrees line of longitude) and the equator (0 degrees line of latitiude) cross, which is just south of Ghana in Africa. From there you go east or west according to the first coordinate and follow that around the earth to the correct line of longitude. Then you go north or south from that point to whatever the latitude indicates. The lines are usually shown on the globe at 15 degree intervals so you will need to interpolate (approximate) the position between the lines.