18.97% is the change from 643 to 765
Calculation steps:
[( 765 - 643 ) ÷ 643] x 100 = 18.97%
Formula
Percentage change = [(765 - 643) / 643] x 100
Subtract the new number by the original number
765 - 643 = 122
122 ÷ 643 = 0.18973561430793157
0.18973561430793157 x 100 = 18.97%