38.14% is the change from 645 to 891
Calculation steps:
[( 891 - 645 ) ÷ 645] x 100 = 38.14%
Formula
Percentage change = [(891 - 645) / 645] x 100
Subtract the new number by the original number
891 - 645 = 246
246 ÷ 645 = 0.3813953488372093
0.3813953488372093 x 100 = 38.14%