20.37% is the change from 643 to 774
Calculation steps:
[( 774 - 643 ) ÷ 643] x 100 = 20.37%
Formula
Percentage change = [(774 - 643) / 643] x 100
Subtract the new number by the original number
774 - 643 = 131
131 ÷ 643 = 0.20373250388802489
0.20373250388802489 x 100 = 20.37%