31.73% is the change from 646 to 851
Calculation steps:
[( 851 - 646 ) ÷ 646] x 100 = 31.73%
Formula
Percentage change = [(851 - 646) / 646] x 100
Subtract the new number by the original number
851 - 646 = 205
205 ÷ 646 = 0.3173374613003096
0.3173374613003096 x 100 = 31.73%