the first answer is 59.2 and the second answer is 1.5
6 goes into both 42 and 108 (9x12 so you are working with equal measurements) and you get 7/18
ROC is often used when speaking about momentum, and it can generally be expressed as a ratio between a change in one variable relative to a corresponding change in another; graphically, the rate of change is represented by the slope of a line. The ROC is often illustrated by the Greek letter delta.
Hope this helps!