-55.4% is the change from 287 to 128
Calculation steps:
[( 128 - 287 ) ÷ 287] x 100 = -55.4%
Formula
Percentage change = [(128 - 287) / 287] x 100
Subtract the new number by the original number
128 - 287 = -159
-159 ÷ 287 = -0.554006968641115
-0.554006968641115 x 100 = -55.4%