5440% is the change from 15 to 831
Calculation steps:
[( 831 - 15 ) ÷ 15] x 100 = 5440%
Formula
Percentage change = [(831 - 15) / 15] x 100
Subtract the new number by the original number
831 - 15 = 816
816 ÷ 15 = 54.4
54.4 x 100 = 5440%
Example