242.5% is the change from 280 to 959
Calculation steps:
[( 959 - 280 ) ÷ 280] x 100 = 242.5%
Formula
Percentage change = [(959 - 280) / 280] x 100
Subtract the new number by the original number
959 - 280 = 679
679 ÷ 280 = 2.425
2.425 x 100 = 242.5%
Example