50.7% is the change from 643 to 969
Calculation steps:
[( 969 - 643 ) ÷ 643] x 100 = 50.7%
Formula
Percentage change = [(969 - 643) / 643] x 100
Subtract the new number by the original number
969 - 643 = 326
326 ÷ 643 = 0.5069984447900466
0.5069984447900466 x 100 = 50.7%