-54.17% is the change from 851 to 390
Calculation steps:
[( 390 - 851 ) ÷ 851] x 100 = -54.17%
Formula
Percentage change = [(390 - 851) / 851] x 100
Subtract the new number by the original number
390 - 851 = -461
-461 ÷ 851 = -0.5417156286721504
-0.5417156286721504 x 100 = -54.17%