There are five elements of a universal systems model: goal, inputs, processes, outputs, and feedback. Which of the following describes the "processes" portion of this model?

here is answ.  

Explanation:

The process represents the operations or methodologies that must be adopted in order to bring about the transformation in the inputs in order to achieve a desired output.

Whereas output represent the desired result, feedback represents the  element of control, input represent the basic material or ingredient that will produce or transform the output and Goal is the ultimate objective.  

because growing process had stoped after 4-5 year

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form