-48.75% is the change from 999 to 512
Calculation steps:
[( 512 - 999 ) ÷ 999] x 100 = -48.75%
Formula
Percentage change = [(512 - 999) / 999] x 100
Subtract the new number by the original number
512 - 999 = -487
-487 ÷ 999 = -0.4874874874874875
-0.4874874874874875 x 100 = -48.75%