49.77% is the change from 643 to 963
Calculation steps:
[( 963 - 643 ) ÷ 643] x 100 = 49.77%
Formula
Percentage change = [(963 - 643) / 643] x 100
Subtract the new number by the original number
963 - 643 = 320
320 ÷ 643 = 0.4976671850699845
0.4976671850699845 x 100 = 49.77%