-47.58% is the change from 641 to 336
Calculation steps:
[( 336 - 641 ) ÷ 641] x 100 = -47.58%
Formula
Percentage change = [(336 - 641) / 641] x 100
Subtract the new number by the original number
336 - 641 = -305
-305 ÷ 641 = -0.47581903276131043
-0.47581903276131043 x 100 = -47.58%