When 5.6 grams of NaCl are dissolved in enough water to create a 125-gram solution, what is the solution's con?

i don't know much about chemistry but i know the first one :) the total m of the solution is 125g, so take away the original 5.6 that gives you 119.4. then do 5.6 divided by 119.4 which is 0.0469... then times that by 100 which gives you a percentage of 4.690.. which round to 4.7% :) easy