Tableau Running Percentage of Total

Question

Let's say I have this data:

good, bad
90, 10
95, 5
99, 1
98, 2

How can I get a tableau chart with these values:

90/100, 185/200, 284/300, 382/400
0.9, 0.925, 0.947, 0.955

The general idea is sum(good) / (sum(good) + sum(bad))

Answer 1

Just use the running_sum like this:

RUNNING_SUM(sum([Good]))
/
RUNNING_SUM(sum([Good]+[Bad]))

You should get somethinh like this (table as an example):

Or like a bar chart: