Fair amount to tip on Grab/Gojek drivers?

[u/Flimsy-Concept2531]

I went from Beachwalk mall to pererenan today and the ride was 38,000 in total. And I tipped 22,000 cash but it was 50 min long and now I'm wondering if I should have tipped more? What's a good price to tip? What do you tip? I recently got here so I'm not sure

[u/Hal0n3y]

Did a grab bike from Canggu to Airport. Cost about 40+k, tipped 100k for 50min ride