Running Percentages DAX Power BI

Hi all,

I'm trying to get running percentages for this dummy dataset based on a real dataset:

MemberID, PortfolioID

1,1

1,2

1,3

1,4

1,5

1,6

1,7

1,8

1,9

1,10

2,1

2,2

2,3

I want to add another column [Running Percentages] to this dataset as below:

MemberID, PortfolioID, RunningPercentage

1,1, 10%

1,2, 20%

1,3, 30%

1,4, 40%

1,5, 50%

1,6, 60%

1,7, 70%

1,8, 80%

1,9, 90%

1,10, 100%

2,1, 33%

2,2, 66%

2,3, 100%

In SQL, there is the percentile_rank, but how do I do this in Power BI?

Thank you!