Cancellation rate by city
Operations watch cancellations. For each city, compute the share of cancelled trips as a percentage rounded to two decimals. Return city and cancel_pct, ordered by city.
Uzorak očekivanog izlaza
Ovako izgleda ispravan odgovor — broj redaka je njegov vlastiti, ne mora se podudarati s tablicama sheme.
| city | cancel_pct |
|---|---|
| Kazan | 33.33 |
| Moscow | 25 |
| Sochi | 50 |
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