50.47% is the change from 642 to 966
Calculation steps:
[( 966 - 642 ) ÷ 642] x 100 = 50.47%
Formula
Percentage change = [(966 - 642) / 642] x 100
Subtract the new number by the original number
966 - 642 = 324
324 ÷ 642 = 0.5046728971962616
0.5046728971962616 x 100 = 50.47%