-48.7% is the change from 1000 to 513
Calculation steps:
[( 513 - 1000 ) ÷ 1000] x 100 = -48.7%
Formula
Percentage change = [(513 - 1000) / 1000] x 100
Subtract the new number by the original number
513 - 1000 = -487
-487 ÷ 1000 = -0.487
-0.487 x 100 = -48.7%