-82.14% is the change from 504 to 90
Calculation steps:
[( 90 - 504 ) ÷ 504] x 100 = -82.14%
Formula
Percentage change = [(90 - 504) / 504] x 100
Subtract the new number by the original number
90 - 504 = -414
-414 ÷ 504 = -0.8214285714285714
-0.8214285714285714 x 100 = -82.14%