-96.5% is the change from 686 to 24
Calculation steps:
[( 24 - 686 ) ÷ 686] x 100 = -96.5%
Formula
Percentage change = [(24 - 686) / 686] x 100
Subtract the new number by the original number
24 - 686 = -662
-662 ÷ 686 = -0.9650145772594753
-0.9650145772594753 x 100 = -96.5%