This equation is in the correct format to use the re-arrangement triangles shown below. This is a useful tool for rearranging some simple equations.

To use the triangle to re-arrange for time, put your finger over time to hide it and you can see that you are left with speed divided by distance being visible.

These triangle only work if there are 3 variable configured in the correct way, they do not work for all equations.

This shows how to do the full rearrangement of s=d/t to make time the subject of the formula using the word equation:

And this shows the symbol equation version: