89.64% is the change from 280 to 531
Calculation steps:
[( 531 - 280 ) ÷ 280] x 100 = 89.64%
Formula
Percentage change = [(531 - 280) / 280] x 100
Subtract the new number by the original number
531 - 280 = 251
251 ÷ 280 = 0.8964285714285715
0.8964285714285715 x 100 = 89.64%