-54.6% is the change from 1000 to 454
Calculation steps:
[( 454 - 1000 ) ÷ 1000] x 100 = -54.6%
Formula
Percentage change = [(454 - 1000) / 1000] x 100
Subtract the new number by the original number
454 - 1000 = -546
-546 ÷ 1000 = -0.546
-0.546 x 100 = -54.6%