-38.28% is the change from 990 to 611
Calculation steps:
[( 611 - 990 ) ÷ 990] x 100 = -38.28%
Formula
Percentage change = [(611 - 990) / 990] x 100
Subtract the new number by the original number
611 - 990 = -379
-379 ÷ 990 = -0.38282828282828285
-0.38282828282828285 x 100 = -38.28%