-60.81% is the change from 990 to 388
Calculation steps:
[( 388 - 990 ) ÷ 990] x 100 = -60.81%
Formula
Percentage change = [(388 - 990) / 990] x 100
Subtract the new number by the original number
388 - 990 = -602
-602 ÷ 990 = -0.6080808080808081
-0.6080808080808081 x 100 = -60.81%