-90.78% is the change from 987 to 91
Calculation steps:
[( 91 - 987 ) ÷ 987] x 100 = -90.78%
Formula
Percentage change = [(91 - 987) / 987] x 100
Subtract the new number by the original number
91 - 987 = -896
-896 ÷ 987 = -0.9078014184397163
-0.9078014184397163 x 100 = -90.78%