As we know, this deals with percentages so 10% of 50 would be 5, because 5 x 10 is 50 we can divide them into 5 equal groups. and the answer is A ; it rounds down to 50 since when you do 9 percent of 578 it goes into 52.02 groups of 9. and we round down
5 lb of trail mix* (2.5 oz of chocolate pieces/ 1 lb of trail mix)= 12.5 oz of chocolate pieces. (Note that the unit cancels out so you get the answer)