-56.6% is the change from 1000 to 434
Calculation steps:
[( 434 - 1000 ) ÷ 1000] x 100 = -56.6%
Formula
Percentage change = [(434 - 1000) / 1000] x 100
Subtract the new number by the original number
434 - 1000 = -566
-566 ÷ 1000 = -0.566
-0.566 x 100 = -56.6%