25.9% is the change from 664 to 836
Calculation steps:
[( 836 - 664 ) ÷ 664] x 100 = 25.9%
Formula
Percentage change = [(836 - 664) / 664] x 100
Subtract the new number by the original number
836 - 664 = 172
172 ÷ 664 = 0.25903614457831325
0.25903614457831325 x 100 = 25.9%