34.79% is the change from 641 to 864
Calculation steps:
[( 864 - 641 ) ÷ 641] x 100 = 34.79%
Formula
Percentage change = [(864 - 641) / 641] x 100
Subtract the new number by the original number
864 - 641 = 223
223 ÷ 641 = 0.34789391575663026
0.34789391575663026 x 100 = 34.79%