Today I got a change request that told me I needed to create a report showing orders broken down by their order types as percentages.

Now the order types part involve SQL queries that translate business rules into multiple table joins and it's quite nasty (200 + lines or so).

Naturally the change request doesn't mention any of these business rules and how to tell that orders are of a specific type... but alas!

It teaches me how to calculate a percentage :)

... like "10 / 100 * 100 = 10%"

I don't know whether to laugh or feel insulted.