239.29% is the change from 280 to 950
Calculation steps:
[( 950 - 280 ) ÷ 280] x 100 = 239.29%
Formula
Percentage change = [(950 - 280) / 280] x 100
Subtract the new number by the original number
950 - 280 = 670
670 ÷ 280 = 2.392857142857143
2.392857142857143 x 100 = 239.29%