-68.29% is the change from 287 to 91
Calculation steps:
[( 91 - 287 ) ÷ 287] x 100 = -68.29%
Formula
Percentage change = [(91 - 287) / 287] x 100
Subtract the new number by the original number
91 - 287 = -196
-196 ÷ 287 = -0.6829268292682927
-0.6829268292682927 x 100 = -68.29%