18.94% is the change from 644 to 766
Calculation steps:
[( 766 - 644 ) ÷ 644] x 100 = 18.94%
Formula
Percentage change = [(766 - 644) / 644] x 100
Subtract the new number by the original number
766 - 644 = 122
122 ÷ 644 = 0.18944099378881987
0.18944099378881987 x 100 = 18.94%