-83.84% is the change from 495 to 80
Calculation steps:
[( 80 - 495 ) ÷ 495] x 100 = -83.84%
Formula
Percentage change = [(80 - 495) / 495] x 100
Subtract the new number by the original number
80 - 495 = -415
-415 ÷ 495 = -0.8383838383838383
-0.8383838383838383 x 100 = -83.84%