-54.29% is the change from 280 to 128
Calculation steps:
[( 128 - 280 ) ÷ 280] x 100 = -54.29%
Formula
Percentage change = [(128 - 280) / 280] x 100
Subtract the new number by the original number
128 - 280 = -152
-152 ÷ 280 = -0.5428571428571428
-0.5428571428571428 x 100 = -54.29%