-20.55% is the change from 623 to 495
Calculation steps:
[( 495 - 623 ) ÷ 623] x 100 = -20.55%
Formula
Percentage change = [(495 - 623) / 623] x 100
Subtract the new number by the original number
495 - 623 = -128
-128 ÷ 623 = -0.20545746388443017
-0.20545746388443017 x 100 = -20.55%