-58.08% is the change from 990 to 415
Calculation steps:
[( 415 - 990 ) ÷ 990] x 100 = -58.08%
Formula
Percentage change = [(415 - 990) / 990] x 100
Subtract the new number by the original number
415 - 990 = -575
-575 ÷ 990 = -0.5808080808080808
-0.5808080808080808 x 100 = -58.08%