-46.94% is the change from 850 to 451
Calculation steps:
[( 451 - 850 ) ÷ 850] x 100 = -46.94%
Formula
Percentage change = [(451 - 850) / 850] x 100
Subtract the new number by the original number
451 - 850 = -399
-399 ÷ 850 = -0.46941176470588236
-0.46941176470588236 x 100 = -46.94%