-90.63% is the change from 960 to 90
Calculation steps:
[( 90 - 960 ) ÷ 960] x 100 = -90.63%
Formula
Percentage change = [(90 - 960) / 960] x 100
Subtract the new number by the original number
90 - 960 = -870
-870 ÷ 960 = -0.90625
-0.90625 x 100 = -90.63%