-90.56% is the change from 964 to 91
Calculation steps:
[( 91 - 964 ) ÷ 964] x 100 = -90.56%
Formula
Percentage change = [(91 - 964) / 964] x 100
Subtract the new number by the original number
91 - 964 = -873
-873 ÷ 964 = -0.9056016597510373
-0.9056016597510373 x 100 = -90.56%