-97.23% is the change from 685 to 19
Calculation steps:
[( 19 - 685 ) ÷ 685] x 100 = -97.23%
Formula
Percentage change = [(19 - 685) / 685] x 100
Subtract the new number by the original number
19 - 685 = -666
-666 ÷ 685 = -0.9722627737226277
-0.9722627737226277 x 100 = -97.23%