-36.94% is the change from 999 to 630
Calculation steps:
[( 630 - 999 ) ÷ 999] x 100 = -36.94%
Formula
Percentage change = [(630 - 999) / 999] x 100
Subtract the new number by the original number
630 - 999 = -369
-369 ÷ 999 = -0.36936936936936937
-0.36936936936936937 x 100 = -36.94%