How to change the 'Save Tag' on the product page from USD to %?

How to change the 'Save Tag' on the product page from USD to %?

If you are on the 1.3 version you will need to do this manually.

{% assign wc_sale_type = 'money' %}  - for amounts
{% assign wc_sale_type = 'percentage' %}  - for % sign

We need to make change to product-card-grid.liquid and product-template.liquid

In version 1.4 you get an option in the customizer.