so ... 100-32 = 68%?
The only way that number (68%) would prove to be true is if you gained 68 shards out of your next 68 attempts. That's not going to happen, but I wish you the best of luck in making that dream come true.
Look at it this way: if you get a shard on attempt 33, you will have had success only 1 time out of 33 tries. If this pattern holds and you try 33 more times, you will get one more shard. A final 33 attempts will give you another 1 shard. Total attempts = 99, total shards = 3.
That's basically 3 shards out of 100 tries. 3/100 = 3%
For homework tonight, take note of your drop rate over the next 33 attempts and report back. Odds are that you will get more than 1 shard. In fact, I would expect closer to 10 or more.