80.71% is the change from 280 to 506
Calculation steps:
[( 506 - 280 ) ÷ 280] x 100 = 80.71%
Formula
Percentage change = [(506 - 280) / 280] x 100
Subtract the new number by the original number
506 - 280 = 226
226 ÷ 280 = 0.8071428571428572
0.8071428571428572 x 100 = 80.71%