-93.94% is the change from 842 to 51
Calculation steps:
[( 51 - 842 ) ÷ 842] x 100 = -93.94%
Formula
Percentage change = [(51 - 842) / 842] x 100
Subtract the new number by the original number
51 - 842 = -791
-791 ÷ 842 = -0.9394299287410927
-0.9394299287410927 x 100 = -93.94%