5340% is the change from 15 to 816
Calculation steps:
[( 816 - 15 ) ÷ 15] x 100 = 5340%
Formula
Percentage change = [(816 - 15) / 15] x 100
Subtract the new number by the original number
816 - 15 = 801
801 ÷ 15 = 53.4
53.4 x 100 = 5340%
Example