Question

Help? I’m not too good at comparing rates lol

Answer 1

just divide the 7,65 by 85 and in this way will get the cost of a screw
and divide the 3,10 by 155 to get the cost of a nail

and compare them

Answer 2

the reason why the 85 and 155 are going to be the second number in those division problems is because the question is asking for "per piece"

since "per piece" is saying that that units we want are the "pieces" it will be the second number in those division problems