2800% is the change from 28 to 812
Calculation steps:
[( 812 - 28 ) ÷ 28] x 100 = 2800%
Formula
Percentage change = [(812 - 28) / 28] x 100
Subtract the new number by the original number
812 - 28 = 784
784 ÷ 28 = 28
28 x 100 = 2800%
Example