-26.82% is the change from 686 to 502
Calculation steps:
[( 502 - 686 ) ÷ 686] x 100 = -26.82%
Formula
Percentage change = [(502 - 686) / 686] x 100
Subtract the new number by the original number
502 - 686 = -184
-184 ÷ 686 = -0.26822157434402333
-0.26822157434402333 x 100 = -26.82%