-89.86% is the change from 641 to 65
Calculation steps:
[( 65 - 641 ) ÷ 641] x 100 = -89.86%
Formula
Percentage change = [(65 - 641) / 641] x 100
Subtract the new number by the original number
65 - 641 = -576
-576 ÷ 641 = -0.8985959438377535
-0.8985959438377535 x 100 = -89.86%