-97.69% is the change from 824 to 19
Calculation steps:
[( 19 - 824 ) ÷ 824] x 100 = -97.69%
Formula
Percentage change = [(19 - 824) / 824] x 100
Subtract the new number by the original number
19 - 824 = -805
-805 ÷ 824 = -0.9769417475728155
-0.9769417475728155 x 100 = -97.69%