-80.75% is the change from 504 to 97
Calculation steps:
[( 97 - 504 ) ÷ 504] x 100 = -80.75%
Formula
Percentage change = [(97 - 504) / 504] x 100
Subtract the new number by the original number
97 - 504 = -407
-407 ÷ 504 = -0.8075396825396826
-0.8075396825396826 x 100 = -80.75%