-30% is the change from 280 to 196
Calculation steps:
[( 196 - 280 ) ÷ 280] x 100 = -30%
Formula
Percentage change = [(196 - 280) / 280] x 100
Subtract the new number by the original number
196 - 280 = -84
-84 ÷ 280 = -0.3
-0.3 x 100 = -30%
Example