What is the greatest 3/5 0.7

How can you tell when x and y are not directly proportional?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Can someone me with my math problem pls my teacher is on my back about this