[Python] Calculate percentage of flag grouped by another column

I have the following dataframe:

Account ID​

Subscription type​

Cancellation flag​

123​

Basic​

1​

222​

Basic​

0​

234​

Hybrid​

1​

345​

Hybrid​

1​

Now I would like to calculate the percentage of cancellations, but grouped by the subscription type. I would like to get it in a format so that I can easily create a bar chart out of the percentages grouped by the subscription type.

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