-77.64% is the change from 966 to 216
Calculation steps:
[( 216 - 966 ) ÷ 966] x 100 = -77.64%
Formula
Percentage change = [(216 - 966) / 966] x 100
Subtract the new number by the original number
216 - 966 = -750
-750 ÷ 966 = -0.7763975155279503
-0.7763975155279503 x 100 = -77.64%