26.82% is the change from 645 to 818
Calculation steps:
[( 818 - 645 ) ÷ 645] x 100 = 26.82%
Formula
Percentage change = [(818 - 645) / 645] x 100
Subtract the new number by the original number
818 - 645 = 173
173 ÷ 645 = 0.2682170542635659
0.2682170542635659 x 100 = 26.82%