32.55% is the change from 642 to 851
Calculation steps:
[( 851 - 642 ) ÷ 642] x 100 = 32.55%
Formula
Percentage change = [(851 - 642) / 642] x 100
Subtract the new number by the original number
851 - 642 = 209
209 ÷ 642 = 0.32554517133956384
0.32554517133956384 x 100 = 32.55%