25.62% is the change from 644 to 809
Calculation steps:
[( 809 - 644 ) ÷ 644] x 100 = 25.62%
Formula
Percentage change = [(809 - 644) / 644] x 100
Subtract the new number by the original number
809 - 644 = 165
165 ÷ 644 = 0.2562111801242236
0.2562111801242236 x 100 = 25.62%