-25.55% is the change from 685 to 510
Calculation steps:
[( 510 - 685 ) ÷ 685] x 100 = -25.55%
Formula
Percentage change = [(510 - 685) / 685] x 100
Subtract the new number by the original number
510 - 685 = -175
-175 ÷ 685 = -0.25547445255474455
-0.25547445255474455 x 100 = -25.55%