-75.82% is the change from 641 to 155
Calculation steps:
[( 155 - 641 ) ÷ 641] x 100 = -75.82%
Formula
Percentage change = [(155 - 641) / 641] x 100
Subtract the new number by the original number
155 - 641 = -486
-486 ÷ 641 = -0.7581903276131046
-0.7581903276131046 x 100 = -75.82%