-97.1% is the change from 966 to 28
Calculation steps:
[( 28 - 966 ) ÷ 966] x 100 = -97.1%
Formula
Percentage change = [(28 - 966) / 966] x 100
Subtract the new number by the original number
28 - 966 = -938
-938 ÷ 966 = -0.9710144927536232
-0.9710144927536232 x 100 = -97.1%