-52.42% is the change from 641 to 305
Calculation steps:
[( 305 - 641 ) ÷ 641] x 100 = -52.42%
Formula
Percentage change = [(305 - 641) / 641] x 100
Subtract the new number by the original number
305 - 641 = -336
-336 ÷ 641 = -0.5241809672386896
-0.5241809672386896 x 100 = -52.42%