-96.13% is the change from 646 to 25
Calculation steps:
[( 25 - 646 ) ÷ 646] x 100 = -96.13%
Formula
Percentage change = [(25 - 646) / 646] x 100
Subtract the new number by the original number
25 - 646 = -621
-621 ÷ 646 = -0.9613003095975232
-0.9613003095975232 x 100 = -96.13%