-30.52% is the change from 403 to 280
Calculation steps:
[( 280 - 403 ) ÷ 403] x 100 = -30.52%
Formula
Percentage change = [(280 - 403) / 403] x 100
Subtract the new number by the original number
280 - 403 = -123
-123 ÷ 403 = -0.3052109181141439
-0.3052109181141439 x 100 = -30.52%