20.4% is the change from 642 to 773
Calculation steps:
[( 773 - 642 ) ÷ 642] x 100 = 20.4%
Formula
Percentage change = [(773 - 642) / 642] x 100
Subtract the new number by the original number
773 - 642 = 131
131 ÷ 642 = 0.20404984423676012
0.20404984423676012 x 100 = 20.4%