-77.54% is the change from 966 to 217
Calculation steps:
[( 217 - 966 ) ÷ 966] x 100 = -77.54%
Formula
Percentage change = [(217 - 966) / 966] x 100
Subtract the new number by the original number
217 - 966 = -749
-749 ÷ 966 = -0.7753623188405797
-0.7753623188405797 x 100 = -77.54%