33.7% is the change from 641 to 857
Calculation steps:
[( 857 - 641 ) ÷ 641] x 100 = 33.7%
Formula
Percentage change = [(857 - 641) / 641] x 100
Subtract the new number by the original number
857 - 641 = 216
216 ÷ 641 = 0.3369734789391576
0.3369734789391576 x 100 = 33.7%