25.41% is the change from 669 to 839
Calculation steps:
[( 839 - 669 ) ÷ 669] x 100 = 25.41%
Formula
Percentage change = [(839 - 669) / 669] x 100
Subtract the new number by the original number
839 - 669 = 170
170 ÷ 669 = 0.25411061285500747
0.25411061285500747 x 100 = 25.41%