18 per cent, I think.
~17% of the total supply / ~18% of the available supply.
Is that right, although it was kind of in between. I only just manged my maths A level, then stuck to humanities after that.
A good idea might be to use up to
10 addresses. They should be nearly identical, just a different Base58 checksum at the end.
The reason: If you throw all the coins in one account, the account will be top of the rich list, it is maybe better if there is a clump of addresses with the same amount in each with just a difference in the last 6 characters of the address.
It means you will not get a big red slice on the chart saying someone own 18% of available supply (pictorially speaking). If they have the same burn address, except for the last 6 characters, and precisely the same dead funds, they will stand out perfectly to any viewer, especially if labelled and verified by the Garden. A few photos, a bit of Twitter, FB, and publicity is sure to come.
You might prefer one address, but perhaps doing it this way is better not just for reasons above, but also for publicity. It will make a nice story to publish, with the addresses for all to see.