185.71% is the change from 280 to 800
Calculation steps:
[( 800 - 280 ) ÷ 280] x 100 = 185.71%
Formula
Percentage change = [(800 - 280) / 280] x 100
Subtract the new number by the original number
800 - 280 = 520
520 ÷ 280 = 1.8571428571428572
1.8571428571428572 x 100 = 185.71%