33.64% is the change from 642 to 858
Calculation steps:
[( 858 - 642 ) ÷ 642] x 100 = 33.64%
Formula
Percentage change = [(858 - 642) / 642] x 100
Subtract the new number by the original number
858 - 642 = 216
216 ÷ 642 = 0.3364485981308411
0.3364485981308411 x 100 = 33.64%