-93.72% is the change from 812 to 51
Calculation steps:
[( 51 - 812 ) ÷ 812] x 100 = -93.72%
Formula
Percentage change = [(51 - 812) / 812] x 100
Subtract the new number by the original number
51 - 812 = -761
-761 ÷ 812 = -0.937192118226601
-0.937192118226601 x 100 = -93.72%