26.32% is the change from 665 to 840
Calculation steps:
[( 840 - 665 ) ÷ 665] x 100 = 26.32%
Formula
Percentage change = [(840 - 665) / 665] x 100
Subtract the new number by the original number
840 - 665 = 175
175 ÷ 665 = 0.2631578947368421
0.2631578947368421 x 100 = 26.32%