Putting the relevant equation in the image

I want to create images that depict how math builds or creates a certain landmark, building, or statistic.

For example, look at this image of an MLB players batting average

If i took an picture of a statistic I could use the equation of how to calculate that statistic and place the equation somewhere in the photo.

In this image i would put the equation how to calculate batting average: Avg. = Hits/At Bats