-25.66% is the change from 686 to 510
Calculation steps:
[( 510 - 686 ) ÷ 686] x 100 = -25.66%
Formula
Percentage change = [(510 - 686) / 686] x 100
Subtract the new number by the original number
510 - 686 = -176
-176 ÷ 686 = -0.2565597667638484
-0.2565597667638484 x 100 = -25.66%