-20.55% is the change from 686 to 545
Calculation steps:
[( 545 - 686 ) ÷ 686] x 100 = -20.55%
Formula
Percentage change = [(545 - 686) / 686] x 100
Subtract the new number by the original number
545 - 686 = -141
-141 ÷ 686 = -0.2055393586005831
-0.2055393586005831 x 100 = -20.55%