patch 0.4 40% less monster and 40% increased loot is not same amount of loot!

The content reveal says the number of monster is decreased by 40% and loot is increased by 40% but that does not yield the same amount of loot as before.

60%(monster) * 1.4(loot increase) = 84% not 100%!

Need to boost loot by at least 67% if decreasing monster by 40% to yield same amount of loot.

This is wrong. They are not reducing monster density by 40%. They are removing a 40% density increase and replacing that with 40% exp and loot increases.

As you yoyrself have said, removing a 40% increase is not nearly mathematically the same as reducing something by 40%