HTML Challenge | Difference between width=“100” and width=“100%”

Question

I get that “100” and “100%” are not the same. But can you help me understand WHAT I SHOULD LOOK OUT FOR WHEN DISTINGUISHING THE TWO?

Does width=“100” and width=“100%” mean the SAME when it’s in the <img> tag?

OR...?

Answer 1

No, that 100 by default means 100 pixel and
the 100% means full width without leaving any space