Good day
I have searched our documentation and i came across a link that helps with the above raised concern.
You need to create/Using an inline function that will convert you whole(integar) number to a decimal.This will result in having to digits instead of one as stated in your matter.
please see the link and the added screenshot,hope it helps or leads you to the right direction in solving the issue:
https://help.k2.com/onlinehelp/k2smartforms/userguide/4.7/default.htm#Build/Workflows/ContextBrowser_Using_Inline_Functions.htm
After the link has opened, collapse/expand the conversion tree-like.
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You can use the Expression on the list view field and 'pad left' with 0 using expression.