20.34% is the change from 644 to 775
Calculation steps:
[( 775 - 644 ) ÷ 644] x 100 = 20.34%
Formula
Percentage change = [(775 - 644) / 644] x 100
Subtract the new number by the original number
775 - 644 = 131
131 ÷ 644 = 0.20341614906832298
0.20341614906832298 x 100 = 20.34%