-38.84% is the change from 999 to 611
Calculation steps:
[( 611 - 999 ) ÷ 999] x 100 = -38.84%
Formula
Percentage change = [(611 - 999) / 999] x 100
Subtract the new number by the original number
611 - 999 = -388
-388 ÷ 999 = -0.3883883883883884
-0.3883883883883884 x 100 = -38.84%