2974.07% is the change from 27 to 830
Calculation steps:
[( 830 - 27 ) ÷ 27] x 100 = 2974.07%
Formula
Percentage change = [(830 - 27) / 27] x 100
Subtract the new number by the original number
830 - 27 = 803
803 ÷ 27 = 29.74074074074074
29.74074074074074 x 100 = 2974.07%