-94.86% is the change from 993 to 51
Calculation steps:
[( 51 - 993 ) ÷ 993] x 100 = -94.86%
Formula
Percentage change = [(51 - 993) / 993] x 100
Subtract the new number by the original number
51 - 993 = -942
-942 ÷ 993 = -0.9486404833836858
-0.9486404833836858 x 100 = -94.86%