Help with displaying / calculating percentage

[shopet5]

Hello all, I hope im posting in the right place.

I have a feedback app that collects customer feedback , good, average, poor.  Currently i can only get the trend to show number of hits to the app  and not percentage of each response good, average, poor over the given time period in this case monthly. can anyone offer advice on how to calculate and display the percentage instead of number of hits? SS below..

[Anonymous]

To show the percentage for each month I would use a different visual - 100% Stacked bar chart:

Sample 100% Stacked bar chart

[shopet5]

Thankyou for the swift response i wanted to show as a line so that over time i can see the trend line through 12 months rather that having 12 stacked bar charts next to each other. I want to also include a percentile line (our KPI) 70% good.