6169.23% is the change from 13 to 815
Calculation steps:
[( 815 - 13 ) ÷ 13] x 100 = 6169.23%
Formula
Percentage change = [(815 - 13) / 13] x 100
Subtract the new number by the original number
815 - 13 = 802
802 ÷ 13 = 61.69230769230769
61.69230769230769 x 100 = 6169.23%