-99.04% is the change from 625 to 6
Calculation steps:
[( 6 - 625 ) ÷ 625] x 100 = -99.04%
Formula
Percentage change = [(6 - 625) / 625] x 100
Subtract the new number by the original number
6 - 625 = -619
-619 ÷ 625 = -0.9904
-0.9904 x 100 = -99.04%
Example