Sometime after the cryptarch patch, i decided to help any of you numbers people (and myself) and get an idea of the chances of what 'rare' engrams would turn into. (If you don't believe me, my Titan's CT level is proof enough.)
Copied directly from my notes:
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Blues-
Blue items: 838 = 83.8%
Purple items: 16 = 1.6%
Motes/coins: 146 = 14.6%
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Long story short, you have roughly a 1.6% chance to get a Legendary out of a Rare engram. (I don't know what it was pre-patch, it might have been under 1%.)
While i was at it, i took note of what any Legendary engrams turned into (out of 100):
Purple items: 64 = 64%
Exotic items: 6 = 6%
Upgrade items: 30 = 30%
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EDIT 3: Updated Legendary numbers. This should be a little more accurate than the previous numbers.
So there you go. You can take these numbers into consideration before you decide to talk about how lucky (or unlucky) you were. Enjoy.
SIDE EDIT: I may update this with results from Legendaries if i get enough between now and a possible update to the CT.
EDIT 2: A few answers to some questions:
-Yes, upgrade items are ascendent shards/energy.
-Titan's current cryptarch level is 106. (dat nightfall bonus)
-I couldn't tell you how many hours it took to do this. I know i started around week 5 or 6. A third or so of those blue engrams came from Tiger strikes, completion or obtained during, and at least half the legendaries were heroic or strike completions or package rewards.
-I doubt CT level has any effect on odds, but at some point you might get a package with 3 legendaries. I did at 87, one of each weapon slot.
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sorry nothing about the post (that was great, and congrats for the hard work) , but about the comments! i see a lot of guys complaining of having blue itens on blue engrams? wtf! u want a purple item fight for it, get vanguard coins and crucible coins to get yours! 4% for exotics on legendary engrams (i think that is over rated, should be 1% too) that rarity makes the happiness when we get the surprise, i hate when i get a blue engram and usualy appear a green one, in the beggingi of the game, now is OK!