-97.66% is the change from 812 to 19
Calculation steps:
[( 19 - 812 ) ÷ 812] x 100 = -97.66%
Formula
Percentage change = [(19 - 812) / 812] x 100
Subtract the new number by the original number
19 - 812 = -793
-793 ÷ 812 = -0.9766009852216748
-0.9766009852216748 x 100 = -97.66%