-51.01% is the change from 641 to 314
Calculation steps:
[( 314 - 641 ) ÷ 641] x 100 = -51.01%
Formula
Percentage change = [(314 - 641) / 641] x 100
Subtract the new number by the original number
314 - 641 = -327
-327 ÷ 641 = -0.5101404056162246
-0.5101404056162246 x 100 = -51.01%