-24.09% is the change from 685 to 520
Calculation steps:
[( 520 - 685 ) ÷ 685] x 100 = -24.09%
Formula
Percentage change = [(520 - 685) / 685] x 100
Subtract the new number by the original number
520 - 685 = -165
-165 ÷ 685 = -0.24087591240875914
-0.24087591240875914 x 100 = -24.09%