2900% is the change from 27 to 810
Calculation steps:
[( 810 - 27 ) ÷ 27] x 100 = 2900%
Formula
Percentage change = [(810 - 27) / 27] x 100
Subtract the new number by the original number
810 - 27 = 783
783 ÷ 27 = 29
29 x 100 = 2900%
Example