34.25% is the change from 511 to 686
Calculation steps:
[( 686 - 511 ) ÷ 511] x 100 = 34.25%
Formula
Percentage change = [(686 - 511) / 511] x 100
Subtract the new number by the original number
686 - 511 = 175
175 ÷ 511 = 0.3424657534246575
0.3424657534246575 x 100 = 34.25%