Bulk updating the product’s price is a common action if you running an online shop.
If you wanna all products’ price changes at the same rate, use Booster for WooCommerce, the free-of-charge version could help you approach it.
You have to change the price one by one but does not mean opening every product edit page.
- typically, export the CSV from the WooCommerce product page, edit it then import.
- use plugins mentioned in this post, these tools help you manage all product data more than just price.