Percent of decrease : Original - New / Original so... 80 - 52 / 80 ----> 28/80 .35 multiply by 100 to get percent 35% increase Hope I helped if you have any questions let me know! :)
I'm sorry you have a lot of Homework. All i know is the 1st step... i believe their are 3 steps to this question, I wish you the best of luck my friend!