50.23% is the change from 643 to 966
Calculation steps:
[( 966 - 643 ) ÷ 643] x 100 = 50.23%
Formula
Percentage change = [(966 - 643) / 643] x 100
Subtract the new number by the original number
966 - 643 = 323
323 ÷ 643 = 0.5023328149300156
0.5023328149300156 x 100 = 50.23%