What do these CSS lines mean?

programming web dev
1

What do these CSS lines mean?

body
{
font:68.75%/1.5 Arial,Helvetica,sans-serif;
}

body
{
line-height:1;
}

Any help would be appreciated? Or if someone could re-write them in simple terms, example:


body
{
font-family: Arial, Helvetica, San-serif;
font-size: 11px;
line-height:1;
}