-26.68% is the change from 686 to 503
Calculation steps:
[( 503 - 686 ) ÷ 686] x 100 = -26.68%
Formula
Percentage change = [(503 - 686) / 686] x 100
Subtract the new number by the original number
503 - 686 = -183
-183 ÷ 686 = -0.26676384839650147
-0.26676384839650147 x 100 = -26.68%