-24.16% is the change from 687 to 521
Calculation steps:
[( 521 - 687 ) ÷ 687] x 100 = -24.16%
Formula
Percentage change = [(521 - 687) / 687] x 100
Subtract the new number by the original number
521 - 687 = -166
-166 ÷ 687 = -0.24163027656477437
-0.24163027656477437 x 100 = -24.16%