34.32% is the change from 641 to 861
Calculation steps:
[( 861 - 641 ) ÷ 641] x 100 = 34.32%
Formula
Percentage change = [(861 - 641) / 641] x 100
Subtract the new number by the original number
861 - 641 = 220
220 ÷ 641 = 0.34321372854914195
0.34321372854914195 x 100 = 34.32%