28.04% is the change from 642 to 822
Calculation steps:
[( 822 - 642 ) ÷ 642] x 100 = 28.04%
Formula
Percentage change = [(822 - 642) / 642] x 100
Subtract the new number by the original number
822 - 642 = 180
180 ÷ 642 = 0.2803738317757009
0.2803738317757009 x 100 = 28.04%