32.87% is the change from 645 to 857
Calculation steps:
[( 857 - 645 ) ÷ 645] x 100 = 32.87%
Formula
Percentage change = [(857 - 645) / 645] x 100
Subtract the new number by the original number
857 - 645 = 212
212 ÷ 645 = 0.32868217054263565
0.32868217054263565 x 100 = 32.87%