-52.12% is the change from 850 to 407
Calculation steps:
[( 407 - 850 ) ÷ 850] x 100 = -52.12%
Formula
Percentage change = [(407 - 850) / 850] x 100
Subtract the new number by the original number
407 - 850 = -443
-443 ÷ 850 = -0.5211764705882352
-0.5211764705882352 x 100 = -52.12%