The price of an item dropped to $84 today. Yesterday it was $120. Find the percentage decrease.

120-84
36
36/100
0.36?

2 answers

120-84 = 36

(36/120)100 = 30%
120-84 = 36 why?

(36/120)100 = 30% why?

i dont understanf why all this happens please explain all steps