-47.74% is the change from 643 to 336
Calculation steps:
[( 336 - 643 ) ÷ 643] x 100 = -47.74%
Formula
Percentage change = [(336 - 643) / 643] x 100
Subtract the new number by the original number
336 - 643 = -307
-307 ÷ 643 = -0.4774494556765163
-0.4774494556765163 x 100 = -47.74%