2.55 grams of KClO3 are dissolved in 25.2 grams of water.  The solution has a final volume of 27.3 ml. 
The molar mass of KClO3 is 122.55 g/mol. 
 
Calculate the concentration of KClO3 in the solution by the following two methods:
1) percent by mass:  
2) molarity: 
 
Round answers to the 100th's place and include units. 
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