-56.56% is the change from 999 to 434
Calculation steps:
[( 434 - 999 ) ÷ 999] x 100 = -56.56%
Formula
Percentage change = [(434 - 999) / 999] x 100
Subtract the new number by the original number
434 - 999 = -565
-565 ÷ 999 = -0.5655655655655656
-0.5655655655655656 x 100 = -56.56%