A few years ago, I made a number line that has common decimals between 0 and 1. I added the equivalent fractions above the decimals and the equivalent percentages below them. I keep it above the whiteboard all year long (except during state testing, of course!) in the hopes that by the time we get to this unit, some of these equivalences may have stuck in some students' brains! Does it work? I think it does...for some. However, for too many, I think it might be invisible until it can help them with their homework:)
The nice thing is that once they do realize it can help them, I notice them looking at it quite often. Even after the unit is "over" they continue to use it at a resource.
On my snow day the other day, I decided to make a smaller version for the students to keep as a resource in their math binders (I added the fraction 2/3 to the student version...missed it on the larger one).
I've also created smaller number lines for the students to use as bookmarks - in the math books or in the books they read for pleasure! This give them super easy access to these equivalences:-)