32.66% is the change from 646 to 857
Calculation steps:
[( 857 - 646 ) ÷ 646] x 100 = 32.66%
Formula
Percentage change = [(857 - 646) / 646] x 100
Subtract the new number by the original number
857 - 646 = 211
211 ÷ 646 = 0.326625386996904
0.326625386996904 x 100 = 32.66%