-15.53% is the change from 966 to 816
Calculation steps:
[( 816 - 966 ) ÷ 966] x 100 = -15.53%
Formula
Percentage change = [(816 - 966) / 966] x 100
Subtract the new number by the original number
816 - 966 = -150
-150 ÷ 966 = -0.15527950310559005
-0.15527950310559005 x 100 = -15.53%