-90.99% is the change from 966 to 87
Calculation steps:
[( 87 - 966 ) ÷ 966] x 100 = -90.99%
Formula
Percentage change = [(87 - 966) / 966] x 100
Subtract the new number by the original number
87 - 966 = -879
-879 ÷ 966 = -0.9099378881987578
-0.9099378881987578 x 100 = -90.99%