-99.04% is the change from 623 to 6
Calculation steps:
[( 6 - 623 ) ÷ 623] x 100 = -99.04%
Formula
Percentage change = [(6 - 623) / 623] x 100
Subtract the new number by the original number
6 - 623 = -617
-617 ÷ 623 = -0.9903691813804173
-0.9903691813804173 x 100 = -99.04%