45% is the change from 280 to 406
Calculation steps:
[( 406 - 280 ) ÷ 280] x 100 = 45%
Formula
Percentage change = [(406 - 280) / 280] x 100
Subtract the new number by the original number
406 - 280 = 126
126 ÷ 280 = 0.45
0.45 x 100 = 45%
Example