-31.99% is the change from 966 to 657
Calculation steps:
[( 657 - 966 ) ÷ 966] x 100 = -31.99%
Formula
Percentage change = [(657 - 966) / 966] x 100
Subtract the new number by the original number
657 - 966 = -309
-309 ÷ 966 = -0.3198757763975155
-0.3198757763975155 x 100 = -31.99%