-74.88% is the change from 641 to 161
Calculation steps:
[( 161 - 641 ) ÷ 641] x 100 = -74.88%
Formula
Percentage change = [(161 - 641) / 641] x 100
Subtract the new number by the original number
161 - 641 = -480
-480 ÷ 641 = -0.748829953198128
-0.748829953198128 x 100 = -74.88%