39% is the change from 641 to 891
Calculation steps:
[( 891 - 641 ) ÷ 641] x 100 = 39%
Formula
Percentage change = [(891 - 641) / 641] x 100
Subtract the new number by the original number
891 - 641 = 250
250 ÷ 641 = 0.39001560062402496
0.39001560062402496 x 100 = 39%