50.55% is the change from 639 to 962
Calculation steps:
[( 962 - 639 ) ÷ 639] x 100 = 50.55%
Formula
Percentage change = [(962 - 639) / 639] x 100
Subtract the new number by the original number
962 - 639 = 323
323 ÷ 639 = 0.5054773082942097
0.5054773082942097 x 100 = 50.55%