-3.6% is the change from 999 to 963
Calculation steps:
[( 963 - 999 ) ÷ 999] x 100 = -3.6%
Formula
Percentage change = [(963 - 999) / 999] x 100
Subtract the new number by the original number
963 - 999 = -36
-36 ÷ 999 = -0.036036036036036036
-0.036036036036036036 x 100 = -3.6%