-38.13% is the change from 800 to 495
Calculation steps:
[( 495 - 800 ) ÷ 800] x 100 = -38.13%
Formula
Percentage change = [(495 - 800) / 800] x 100
Subtract the new number by the original number
495 - 800 = -305
-305 ÷ 800 = -0.38125
-0.38125 x 100 = -38.13%