30.22% is the change from 493 to 642
Calculation steps:
[( 642 - 493 ) ÷ 493] x 100 = 30.22%
Formula
Percentage change = [(642 - 493) / 493] x 100
Subtract the new number by the original number
642 - 493 = 149
149 ÷ 493 = 0.3022312373225152
0.3022312373225152 x 100 = 30.22%