Alternatively: The kindle 2 was what, 300USD? I think that's about what it sold for the majority of the time it was released. So a reduction from 300 to 100 i

Alternatively: The kindle 2 was what, 300USD? I think that's about what it sold for the majority of the time it was released. So a reduction from 300 to 100 is 66% off, while a reduction from 300 to 140 is a little bit over 50% off. If your guess is 66% off and actual is on the high end of 50%, that's not a bad guess in my book.