How to get KPI'S Difference in between Latest values to Previous values in percentages

How to get KPI'S Difference in between Latest values to Previous values in percentages

Please how can I get this below  KPI's difference of previous  value to Latest value

Please let me know how to achieve it.  

I need to Know How to Show the  below KPI's Percentage Values.

This is my dashboard KPI's 

How can get that negative values of KPI's.