-55.09% is the change from 285 to 128
Calculation steps:
[( 128 - 285 ) ÷ 285] x 100 = -55.09%
Formula
Percentage change = [(128 - 285) / 285] x 100
Subtract the new number by the original number
128 - 285 = -157
-157 ÷ 285 = -0.5508771929824562
-0.5508771929824562 x 100 = -55.09%