-31.16% is the change from 966 to 665
Calculation steps:
[( 665 - 966 ) ÷ 966] x 100 = -31.16%
Formula
Percentage change = [(665 - 966) / 966] x 100
Subtract the new number by the original number
665 - 966 = -301
-301 ÷ 966 = -0.3115942028985507
-0.3115942028985507 x 100 = -31.16%