-53.7% is the change from 851 to 394
Calculation steps:
[( 394 - 851 ) ÷ 851] x 100 = -53.7%
Formula
Percentage change = [(394 - 851) / 851] x 100
Subtract the new number by the original number
394 - 851 = -457
-457 ÷ 851 = -0.5370152761457109
-0.5370152761457109 x 100 = -53.7%