I'm not sure if this is the best method to go about this, but here is my problem:
I want to display the discount percentage on an item (i.e. Sales Price - Regular Price / Regular Price * 100)
Woocommerce doesn't natively store that info, it only stores sales price and regular price.
I'm looking to display this in Revolution Slider, so I want to have it as meta values.
I'm not sure if this is the best approach.
Further, I wouldn't be sure where to start with trying to create a new entry in wp_postmeta.
Would I be looking at creating a small plugin or do you think there's a simpler way to achieve what I want?