-94.08% is the change from 861 to 51
Calculation steps:
[( 51 - 861 ) ÷ 861] x 100 = -94.08%
Formula
Percentage change = [(51 - 861) / 861] x 100
Subtract the new number by the original number
51 - 861 = -810
-810 ÷ 861 = -0.9407665505226481
-0.9407665505226481 x 100 = -94.08%