simple html5 question

Hey everyone

I've got a very simple html5 question, not sure if here's good place to ask, but since it's super easy, please advise how to handle:

I have a simple table tag: <table width="200" border="0">

Which is rejected by W3 Validator: https://validator.w3.org/nu/

I need advise how to use it as CSS, I wrote:

<table style="width:100%;border: 0px">

But am not sure if it's correct?

first " is opened for both width & border? or should be opened separately?

second separating those properties using one ; without space it correct?

anything? it's just fine? thanks.