Sidebar width

Hi,
I have changed my sidebar and column width with

@media (min-width: 992px){
    #ktsidebar.kad-sidebar {width: 30%}
    .main.col-lg-9 {width:70%;}
}

but I was wondering if you can also change to decimals, like 29.5 %and 70.5% for example because this would look better aligned with my main navigation. Or do you always need to use full numbers?