-96.11% is the change from 643 to 25
Calculation steps:
[( 25 - 643 ) ÷ 643] x 100 = -96.11%
Formula
Percentage change = [(25 - 643) / 643] x 100
Subtract the new number by the original number
25 - 643 = -618
-618 ÷ 643 = -0.9611197511664075
-0.9611197511664075 x 100 = -96.11%