Check out example codes for "css paragraph spacing". It will help you in understanding the concepts better.

Code Example 1

div.a {
  line-height: normal;
}

div.b {
  
    line-height: 1.6;
}

div.c {
  line-height: 
    80%;
}

div.d {
  line-height: 200%;
}

Code Example 2

line-height: 20px; /* 4px +12px + 4px */
/* OR */
line-height: 1.7em; /* 1em = 12px in this case. 20/12 == 1.666666  */

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