-81.82% is the change from 495 to 90
Calculation steps:
[( 90 - 495 ) ÷ 495] x 100 = -81.82%
Formula
Percentage change = [(90 - 495) / 495] x 100
Subtract the new number by the original number
90 - 495 = -405
-405 ÷ 495 = -0.8181818181818182
-0.8181818181818182 x 100 = -81.82%