-46.36% is the change from 839 to 450
Calculation steps:
[( 450 - 839 ) ÷ 839] x 100 = -46.36%
Formula
Percentage change = [(450 - 839) / 839] x 100
Subtract the new number by the original number
450 - 839 = -389
-389 ÷ 839 = -0.4636471990464839
-0.4636471990464839 x 100 = -46.36%