30.27% is the change from 641 to 835
Calculation steps:
[( 835 - 641 ) ÷ 641] x 100 = 30.27%
Formula
Percentage change = [(835 - 641) / 641] x 100
Subtract the new number by the original number
835 - 641 = 194
194 ÷ 641 = 0.30265210608424337
0.30265210608424337 x 100 = 30.27%