-87.06% is the change from 394 to 51
Calculation steps:
[( 51 - 394 ) ÷ 394] x 100 = -87.06%
Formula
Percentage change = [(51 - 394) / 394] x 100
Subtract the new number by the original number
51 - 394 = -343
-343 ÷ 394 = -0.8705583756345178
-0.8705583756345178 x 100 = -87.06%