-26.09% is the change from 686 to 507
Calculation steps:
[( 507 - 686 ) ÷ 686] x 100 = -26.09%
Formula
Percentage change = [(507 - 686) / 686] x 100
Subtract the new number by the original number
507 - 686 = -179
-179 ÷ 686 = -0.260932944606414
-0.260932944606414 x 100 = -26.09%