Be sure you are not multiplying the denominator by 100. (My computer PEMDAS is making me paranoid.) Otherwise looks correct.
@Prince_Azmiran_Myrian lol I just got slight lazy as I typed. @Generic.Archdemon had to check because the head engineer insisted that I had done it wrong somewhere as the figure supposed to show not more than 1% increase.
If they don't want it in percent, how in the world are you supposed to show the thing hasn't increased by less than 1%!?
*technically a simulation engr, cuz the department don't want me but at the same time, I am not worth firing.
Original value/ old = 120
new value / 130
((130-120)/120 )*100 =8.33% growth