GROWTH per week

Hello All,

I created monthly dashboard report for our servers capacity utilization.
Here are some related fields;

Full Capacity (GIB)
Used Capacity (GIB)
Available Capacity (GIB)
Used Capacity Average
Week
Name (Servers name)
Impact (low, medium, high)

Based on that I able to create some graphs.

now I want to display GROWTH

My understanding logic is as follows;

current week - (subtracts) previous week / (divide) current week * (times) 100

How can I add this logic so data will display on dashboard.

Any help will be appreciated.

Thanks