2857.14% is the change from 28 to 828
Calculation steps:
[( 828 - 28 ) ÷ 28] x 100 = 2857.14%
Formula
Percentage change = [(828 - 28) / 28] x 100
Subtract the new number by the original number
828 - 28 = 800
800 ÷ 28 = 28.571428571428573
28.571428571428573 x 100 = 2857.14%