-56.5% is the change from 1000 to 435
Calculation steps:
[( 435 - 1000 ) ÷ 1000] x 100 = -56.5%
Formula
Percentage change = [(435 - 1000) / 1000] x 100
Subtract the new number by the original number
435 - 1000 = -565
-565 ÷ 1000 = -0.565
-0.565 x 100 = -56.5%