-51.35% is the change from 851 to 414
Calculation steps:
[( 414 - 851 ) ÷ 851] x 100 = -51.35%
Formula
Percentage change = [(414 - 851) / 851] x 100
Subtract the new number by the original number
414 - 851 = -437
-437 ÷ 851 = -0.5135135135135135
-0.5135135135135135 x 100 = -51.35%