how to use br to reduce the space in css

on your code editor ( dreamweaver or notepad);

1. type 

.shortentbrclasshere br {
height40%;
}

2.save it as a .css file

3. Remember to link your css to your html file.

4.Apply the 'br' tag on your reference need to your html.

etc;

dummy dummy dummy
 dummy dummy dummy

good luck ;)