-48.2% is the change from 1000 to 518
Calculation steps:
[( 518 - 1000 ) ÷ 1000] x 100 = -48.2%
Formula
Percentage change = [(518 - 1000) / 1000] x 100
Subtract the new number by the original number
518 - 1000 = -482
-482 ÷ 1000 = -0.482
-0.482 x 100 = -48.2%