Check out example codes for "how to place a table in center in css". It will help you in understanding the concepts better.

Code Example 1

table#yourTable {
    position: fixed;
    left: 50%;
    top: 50%;
    margin: -(H/2)px -(W/2)px;
    width: Wpx;
    height: Hpx;
}

Code Example 2

.center {
  margin-left: auto;
  margin-right: auto;
}

Code Example 3

<table style="border:1px solid black;margin-left:auto;margin-right:auto;">

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