Table calc is really table dependent and it's impossible to provide answer without actual data.
Please attach packaged workbook with sample data.
Yes you can - not exactly sure it you just wanted a net diff or a % on the % but see the attached
the difference is LOOKUP(([change %]),0) - LOOKUP(([change %]),-1) from the change percent
making that a % is (LOOKUP(([change %]),0) - LOOKUP(([change %]),-1))/LOOKUP(([change %]),0)
Let me know if that helped
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