Bootstrap Columns

col-md-12

<div class="col-md-12"> is equal to 100% width

col-md-11

<div class="col-md-11"> is equal to 91.66666666666666% width

1

8.33%

col-md-10

<div class="col-md-10"> is equal to 83.33333333333334% width

col-md-2

16.66%

col-md-9

<div class="col-md-9"> is equal to 75% width

col-md-3

<div class="col-md-3"> 25%

col-md-8

<div class="col-md-8"> is equal to 66.66666666666666% width

col-md-4

<div class="col-md-4"> 33.33% width

col-md-7

<div class="col-md-7"> is equal to 58.333333333333336% width

col-md-5

<div class="col-md-5"> is equal to 41.667%

col-md-6

<div class="col-md-6"> is equal to 50% width

col-md-6

<div class="col-md-6"> is equal to  50% width