-43.21% is the change from 280 to 159
Calculation steps:
[( 159 - 280 ) ÷ 280] x 100 = -43.21%
Formula
Percentage change = [(159 - 280) / 280] x 100
Subtract the new number by the original number
159 - 280 = -121
-121 ÷ 280 = -0.43214285714285716
-0.43214285714285716 x 100 = -43.21%