-32.5% is the change from 280 to 189
Calculation steps:
[( 189 - 280 ) ÷ 280] x 100 = -32.5%
Formula
Percentage change = [(189 - 280) / 280] x 100
Subtract the new number by the original number
189 - 280 = -91
-91 ÷ 280 = -0.325
-0.325 x 100 = -32.5%