-24.6% is the change from 687 to 518
Calculation steps:
[( 518 - 687 ) ÷ 687] x 100 = -24.6%
Formula
Percentage change = [(518 - 687) / 687] x 100
Subtract the new number by the original number
518 - 687 = -169
-169 ÷ 687 = -0.24599708879184862
-0.24599708879184862 x 100 = -24.6%