-59.66% is the change from 999 to 403
Calculation steps:
[( 403 - 999 ) ÷ 999] x 100 = -59.66%
Formula
Percentage change = [(403 - 999) / 999] x 100
Subtract the new number by the original number
403 - 999 = -596
-596 ÷ 999 = -0.5965965965965966
-0.5965965965965966 x 100 = -59.66%