-46.43% is the change from 280 to 150
Calculation steps:
[( 150 - 280 ) ÷ 280] x 100 = -46.43%
Formula
Percentage change = [(150 - 280) / 280] x 100
Subtract the new number by the original number
150 - 280 = -130
-130 ÷ 280 = -0.4642857142857143
-0.4642857142857143 x 100 = -46.43%