-18.18% is the change from 495 to 405
Calculation steps:
[( 405 - 495 ) ÷ 495] x 100 = -18.18%
Formula
Percentage change = [(405 - 495) / 495] x 100
Subtract the new number by the original number
405 - 495 = -90
-90 ÷ 495 = -0.18181818181818182
-0.18181818181818182 x 100 = -18.18%