Hi @ranaali9320!
How are you trying to increase the 15% price of your products? By using the core bulk edit option of WooCommerce? If you are using it, kindly note that it has some limitations as it works only for simple products and not variable, grouped, or complicated ones.
https://woocommerce.com/document/bulk-editing-products/
Another way to do it is through a CSV file. To do this, export your products CSV file by going to Products > All products
, and then click the Export option.
Once you have the file, please open it and search the Price column. There, you can use formulas to bulk edit the prices. Once you have edited them, upload the file to your site using the Import tool and selecting the Update existing products option.
If possible, please avoid Microsoft Excel due to formatting and character encoding issues.
You can find more information about using the CSV Importer & Exporter option here:
https://woocommerce.com/document/product-csv-importer-exporter/
Another way you can achieve this is through plugins like:
* https://woocommerce.com/products/bulk-edit-products-prices-and-attributes
* https://woocommerce.com/products/product-bulk-editor-for-woocommerce
Also, you can take a look at this article for pointers.
I hope this helps!