Hi @naveed849 ,
I see you’d like to work on building your store with decimal quantity product features, allowing you to set quantities like 0.3 with increments of 0.1, which is a great setup!
By default, WooCommerce doesn’t natively support decimal product quantities. However, you can achieve this functionality with plugins. I noticed you’re already using the Decimal Product Quantity for WooCommerce plugin, but it seems to be causing a compatibility issue with WooPayments. In this case, I recommend reaching out to the plugin author for assistance in resolving the compatibility.
If you’re looking for a solution that we officially support and is less likely to cause compatibility issues, you might want to check out the Quantity Buttons for WooCommerce plugin, as @devmuhib suggested. This plugin allows you to sell products in decimal quantities seamlessly.
WooCommerce offers a 30-day refund policy, so you can test the extensions and make sure they meet your needs. If you have any questions before purchasing, you can reach out to us at WooCommerce.com → My Account → Support (you’ll just need to create an account if you don’t already have one).
I hope this helps! Let me know if you need further assistance.