But if you've boiled off half the water, you've lost 50%, not 1%. That's why I agree with dieseltaylor, the ratio of water to solid berry is not relevant, it's a red herring. Well, that and because he agreed with me.
There's a name for a mathmatical equation that can logically lead to a silly conclusion. But it's not coming to me at the moment.
Here's another example; Three men check into a hotel. The front desk clerk tells them it costs $30 per night. They each pay $10 and go to their room. Later the cleark realizes he made a mistake and should have charged only $25. So he gives five $1's to the bell boy and tells him to take it to the men. On the way the bell boy realizes he can't split this evenly among the men. So he decides to give the men $3 and to keep the remaining $2 for himself. So in effect each man has paid $9. 3 x $9 = $27. Plus the $2 the bell boy kept is $29. What happened to the other $1? The answer of course is that (3 x 9) + 2 = 29 is the wrong equation. The correct equation is 25 + 3 + 2 = 30.
I think something like this is happening to our berries.