Hi, Mykhailo,
Based on the provided information, I have created a sample project. I have tested out both cases - setting positive and negative numbers. Regardless, the decimals are always reset and not take into account.
Could you test out the example and see if the behavior could be replicated there? If yes, let me know the needed steps:
Looking forward to your reply.
Best Regards,
Anton Mironov
Progress Telerik