26.98% is the change from 645 to 819
Calculation steps:
[( 819 - 645 ) ÷ 645] x 100 = 26.98%
Formula
Percentage change = [(819 - 645) / 645] x 100
Subtract the new number by the original number
819 - 645 = 174
174 ÷ 645 = 0.26976744186046514
0.26976744186046514 x 100 = 26.98%