-93.94% is the change from 495 to 30
Calculation steps:
[( 30 - 495 ) ÷ 495] x 100 = -93.94%
Formula
Percentage change = [(30 - 495) / 495] x 100
Subtract the new number by the original number
30 - 495 = -465
-465 ÷ 495 = -0.9393939393939394
-0.9393939393939394 x 100 = -93.94%