-64.39% is the change from 643 to 229
Calculation steps:
[( 229 - 643 ) ÷ 643] x 100 = -64.39%
Formula
Percentage change = [(229 - 643) / 643] x 100
Subtract the new number by the original number
229 - 643 = -414
-414 ÷ 643 = -0.6438569206842923
-0.6438569206842923 x 100 = -64.39%