-99.22% is the change from 641 to 5
Calculation steps:
[( 5 - 641 ) ÷ 641] x 100 = -99.22%
Formula
Percentage change = [(5 - 641) / 641] x 100
Subtract the new number by the original number
5 - 641 = -636
-636 ÷ 641 = -0.9921996879875195
-0.9921996879875195 x 100 = -99.22%