-2.65% is the change from 830 to 808
Calculation steps:
[( 808 - 830 ) ÷ 830] x 100 = -2.65%
Formula
Percentage change = [(808 - 830) / 830] x 100
Subtract the new number by the original number
808 - 830 = -22
-22 ÷ 830 = -0.02650602409638554
-0.02650602409638554 x 100 = -2.65%